2nd Grade | Unit 10
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1¢
25¢ 1¢
¢ 25
11 12 1 2 10 3 9 4 8 7 6 5
1¢
MATH Student Book
2nd Grade | Unit 10
2+2 =
Unit 10 | REVIEW
REVIEW
MATH 210 Introduction |3
1. Addition....................................................................... 5 Rounding |7 Story Problems |9
Self Test 1 |11
2. Subtraction.............................................................. 13 Even and Odd |14 Money |15
Skill Builders |18 Self Test 2 |21
3. Graphs....................................................................... 23 Digital Clocks |24 Perimeter and Area |25
Addition and Subtraction |26 Self Test 3 |30
4. Fractions................................................................... 32 3-Digit Addition and Subtraction |34
Sensible Answers |36 Self Test 4 |39
5. Patterns.................................................................... 41 Solid Shapes |43 Numbers |44
Story Problems |45 Self Test 5 |47
LIFEPAC Test |Pull-out
|1
REVIEW | Unit 10
NOTE to teachers, parents, and students: As part of a continuing effort to improve the LIFEPAC curriculum, a new layout of this unit has been produced. The content of this unit has not changed but the page numbers referenced in the Teacher Notes of the Teacher’s Guide you are using may no longer correspond. One option is to follow through the activities in sequence and ignore the page numbers in the original Teacher Notes. The other option is to use the updated pages for the Teacher Notes that have been included in the back of this unit. These pages can be used to direct the instructional process as the student works through the unit. All of the pages of this unit are perforated so the updated Teacher Notes pages can be easily removed and referenced as needed.
Author: Carol Bauler, B.A. Editor: Alan Christopherson, M.S. Media Credits: Page 3: © Kristina Afanasyeva, Hemera, Thinkstock; 10: © Marie Kelley, Hemera, Thinkstock.
804 N. 2nd Ave. E. Rock Rapids, IA 51246-1759 © MCMXCVIII by Alpha Omega Publications, Inc. All rights reserved. LIFEPAC is a registered trademark of Alpha Omega Publications, Inc. All trademarks and/or service marks referenced in this material are the property of their respective owners. Alpha Omega Publications, Inc. makes no claim of ownership to any trademarks and/or service marks other than their own and their affiliates, and makes no claim of affiliation to any companies whose trademarks may be listed in this material, other than their own.
2|
Unit 10 | REVIEW
REVIEW
Learn with our friends! They’ll guide you through the LIFEPACs and keep the scores for you. Hey, I’m Roxie. Let’s study!
Nice to see you. I’m Dr. Kirke.
Come along! I am Filmore. Tammy here. Are you ready to learn?
Introduction | 3
REVIEW | Unit 10
Objectives Read these objectives. They will tell what you will be able to do when you have finished this LIFEPAC®. 1. 2. 3. 4. 5. 6. 7.
I can add without the carry box. I can round numbers to the hundreds’ place. I can learn rules for adding even and odd numbers. I can read a digital clock. I can learn to give sensible answers to story problems. I can find solid shapes in objects. I can review and practice the things I have learned.
4 | Introduction
Unit 10 | REVIEW
1. ADDITION We can add three numbers in the hundreds. Add the ones. 6 + 1 + 2 = 9 246 321 Add the tens. 4 + 2 + 0 = 6 + 202 Add the hundreds. 2+3+2=7 769 The answer is seven hundred sixty-nine.
Add. 1.1
132 354 + 511
423 412 331 371 250 142 + 105 + 330 + 202
263 214 + 321
425 110 + 423
216 314 261 360 104 204 + 100 + 260 + 310
330 105 + 212
_
Write the answer to the last problem in number words.
_
__________________________________________________
Section 1 | 5
REVIEW | Unit 10
Sometimes we do not need to carry when we add. Sometimes we do need to carry when we add. do not carry do carry
36 + 42 78
538 + 241 779
1 47 + 86 133
1 379 + 205 584
There are no carry boxes in these problems. You must decide if you need to carry. When you carry a number, put the number in the same place as shown in the example.
Add. 1.2_
6 | Section 1
56 + 34
72 + 81
45 + 66
27 + 45
52 + 36
29 + 63
384 + 509
432 + 331
549 + 376
343 + 252
654 + 248
278 + 346
591 + 235
446 + 129
285 + 475
396 + 461
Unit 10 | REVIEW
Rounding 0
10 5
20 15
30 25
40 35
50 45
60
70
58
55
65
80 75
90 85
100 95
We can round a number by finding its nearest tens’ number. A number rounded to tens always ends in zero (0). We want to round 58 to the tens’ place. We find 58 on the number line. The tens’ number 58 is nearest to is 60. We can round 58 to 60.
Round these numbers to the tens’ place. 1.3
42 ____________ 21 _____________ 94 _____________ 61 ____________ 18 _____________ 87 _____________ 76 ____________ 9 _____________ 33 _____________
We want to round 45 to the tens’ place. 45 is exactly between 40 and 50. If a number ends in 5, we round to the next higher tens’ number. We can round 45 to 50. 1.4
Round these numbers to the tens’ place.
75 ____________ 92 _____________ 15 _____________ 34 ____________ 85 _____________ 39 _____________ 63 ____________ 41 _____________ 65 _____________
1.5
Circle the numbers in the tens’ place.
6 7
8 4 2
5 4 8
5
5 3
792 Section 1 | 7
REVIEW | Unit 10
0
100 50
200
150
300
250
400
350
500
450
600647 700
550
650
800
750
900 1,000
850
950
Look at the new number line. How is it different from the number line shown before activity 1.3? The number after 999 is 1,000. We say “one thousand.” Count by 100’s to 1,000. Count by 50’s to 1,000. We want to round 647 to the nearest 100’s. We find 647 on the number line. The hundreds’ number 647 is nearest to is 600. We can round 647 to 600. If a number ends in 50, it is always rounded to the next higher number. We can round 650 to 700.
Round the numbers to the nearest 100’s. Follow the steps. 1.6
326 ___________ 872 ___________ 989 ___________
425 ___________ 103 ___________ 846 ___________
350 ___________ 275 ___________ 718 ___________
615 ___________ 555 ___________ 381 ___________
313 ___________ 949 ___________ 251 ___________
1.7
Circle the numbers in the hundreds’ place.
4 3 6
8 | Section 1
8 5 2
7 9
3 0 6
4
597
Unit 10 | REVIEW
Story Problems Read the story. Write the answer. 1.8
Jodie and Jeremy were going to summer camp. They were leaving at 6:30 in the morning. Was that A.M. or P.M? ____________
There were four buses going to camp. The first bus carried 39 children, the second bus 51, the third bus 48, and the fourth bus 42. How many children were there altogether?
____________
Jeremy counted mosquitoes every night. He counted 124 the first night, 58 the second night, and 137 the third night. How many mosquitoes did he count altogether? ____________
Jodie and Jeremy each saw a snake. Jodie said her snake was 14 inches long. Jeremy said his snake was 1 foot long. Who saw the longer snake? ____________ Section 1 | 9
REVIEW | Unit 10
There were 10 children in the bunk house. One night, they cooked hamburgers. Each child wanted 2 hamburgers. How many hamburgers did they cook? ____________
The last night, all of the children that went to camp roasted marshmallows. Each child ate two marshmallows. How many marshmallows were eaten altogether? ____________
When Jodie and Jeremy arrived home, 1 they each ate __ 6 of an apple pie. How much pie did they eat altogether?
____________
Before you take the Self Test, study what you have read and done. The Self Test will check what you remember. 10 | Section 1
Unit 10 | REVIEW
SELF TEST 1 Each answer = 1 point, except where otherwise noted 1.01 Add. Remember to carry.
63 + 22
78 + 35
563 + 215
675 + 227
46 + 51
89 + 65
18 + 32
381 + 462
325 141 + 520
244 302 + 451
1.02
Write in number words.
_
345 _____________________________________________
1.03
Round to the nearest 100.
567 _________
312 _________
750 _________
Section 1 | 11
REVIEW | Unit 10
1.04
Write the answer. (2 points)
There were 237 children at summer camp and each one wrote two letters. How many letters were written altogether?
13 16 12 | Section 1
Teacher Check
_____________ Initial
Date
____________
My Score
MAT0210 – Feb ‘17 Printing 804 N. 2nd Ave. E. Rock Rapids, IA 51246-1759 800-622-3070 www.aop.com
ISBN 978-1-58095-380-1
9 781580 953801
1¢
25¢ 1¢
¢ 25
11 12 1 2 10 3 9 4 8 7 6 5
1¢
MATH Student Book
2nd Grade | Unit 10
2+2 =
Unit 10 | REVIEW
REVIEW
MATH 210 Introduction |3
1. Addition....................................................................... 5 Rounding |7 Story Problems |9
Self Test 1 |11
2. Subtraction.............................................................. 13 Even and Odd |14 Money |15
Skill Builders |18 Self Test 2 |21
3. Graphs....................................................................... 23 Digital Clocks |24 Perimeter and Area |25
Addition and Subtraction |26 Self Test 3 |30
4. Fractions................................................................... 32 3-Digit Addition and Subtraction |34
Sensible Answers |36 Self Test 4 |39
5. Patterns.................................................................... 41 Solid Shapes |43 Numbers |44
Story Problems |45 Self Test 5 |47
LIFEPAC Test |Pull-out
|1
REVIEW | Unit 10
NOTE to teachers, parents, and students: As part of a continuing effort to improve the LIFEPAC curriculum, a new layout of this unit has been produced. The content of this unit has not changed but the page numbers referenced in the Teacher Notes of the Teacher’s Guide you are using may no longer correspond. One option is to follow through the activities in sequence and ignore the page numbers in the original Teacher Notes. The other option is to use the updated pages for the Teacher Notes that have been included in the back of this unit. These pages can be used to direct the instructional process as the student works through the unit. All of the pages of this unit are perforated so the updated Teacher Notes pages can be easily removed and referenced as needed.
Author: Carol Bauler, B.A. Editor: Alan Christopherson, M.S. Media Credits: Page 3: © Kristina Afanasyeva, Hemera, Thinkstock; 10: © Marie Kelley, Hemera, Thinkstock.
804 N. 2nd Ave. E. Rock Rapids, IA 51246-1759 © MCMXCVIII by Alpha Omega Publications, Inc. All rights reserved. LIFEPAC is a registered trademark of Alpha Omega Publications, Inc. All trademarks and/or service marks referenced in this material are the property of their respective owners. Alpha Omega Publications, Inc. makes no claim of ownership to any trademarks and/or service marks other than their own and their affiliates, and makes no claim of affiliation to any companies whose trademarks may be listed in this material, other than their own.
2|
Unit 10 | REVIEW
REVIEW
Learn with our friends! They’ll guide you through the LIFEPACs and keep the scores for you. Hey, I’m Roxie. Let’s study!
Nice to see you. I’m Dr. Kirke.
Come along! I am Filmore. Tammy here. Are you ready to learn?
Introduction | 3
REVIEW | Unit 10
Objectives Read these objectives. They will tell what you will be able to do when you have finished this LIFEPAC®. 1. 2. 3. 4. 5. 6. 7.
I can add without the carry box. I can round numbers to the hundreds’ place. I can learn rules for adding even and odd numbers. I can read a digital clock. I can learn to give sensible answers to story problems. I can find solid shapes in objects. I can review and practice the things I have learned.
4 | Introduction
Unit 10 | REVIEW
1. ADDITION We can add three numbers in the hundreds. Add the ones. 6 + 1 + 2 = 9 246 321 Add the tens. 4 + 2 + 0 = 6 + 202 Add the hundreds. 2+3+2=7 769 The answer is seven hundred sixty-nine.
Add. 1.1
132 354 + 511
423 412 331 371 250 142 + 105 + 330 + 202
263 214 + 321
425 110 + 423
216 314 261 360 104 204 + 100 + 260 + 310
330 105 + 212
_
Write the answer to the last problem in number words.
_
__________________________________________________
Section 1 | 5
REVIEW | Unit 10
Sometimes we do not need to carry when we add. Sometimes we do need to carry when we add. do not carry do carry
36 + 42 78
538 + 241 779
1 47 + 86 133
1 379 + 205 584
There are no carry boxes in these problems. You must decide if you need to carry. When you carry a number, put the number in the same place as shown in the example.
Add. 1.2_
6 | Section 1
56 + 34
72 + 81
45 + 66
27 + 45
52 + 36
29 + 63
384 + 509
432 + 331
549 + 376
343 + 252
654 + 248
278 + 346
591 + 235
446 + 129
285 + 475
396 + 461
Unit 10 | REVIEW
Rounding 0
10 5
20 15
30 25
40 35
50 45
60
70
58
55
65
80 75
90 85
100 95
We can round a number by finding its nearest tens’ number. A number rounded to tens always ends in zero (0). We want to round 58 to the tens’ place. We find 58 on the number line. The tens’ number 58 is nearest to is 60. We can round 58 to 60.
Round these numbers to the tens’ place. 1.3
42 ____________ 21 _____________ 94 _____________ 61 ____________ 18 _____________ 87 _____________ 76 ____________ 9 _____________ 33 _____________
We want to round 45 to the tens’ place. 45 is exactly between 40 and 50. If a number ends in 5, we round to the next higher tens’ number. We can round 45 to 50. 1.4
Round these numbers to the tens’ place.
75 ____________ 92 _____________ 15 _____________ 34 ____________ 85 _____________ 39 _____________ 63 ____________ 41 _____________ 65 _____________
1.5
Circle the numbers in the tens’ place.
6 7
8 4 2
5 4 8
5
5 3
792 Section 1 | 7
REVIEW | Unit 10
0
100 50
200
150
300
250
400
350
500
450
600647 700
550
650
800
750
900 1,000
850
950
Look at the new number line. How is it different from the number line shown before activity 1.3? The number after 999 is 1,000. We say “one thousand.” Count by 100’s to 1,000. Count by 50’s to 1,000. We want to round 647 to the nearest 100’s. We find 647 on the number line. The hundreds’ number 647 is nearest to is 600. We can round 647 to 600. If a number ends in 50, it is always rounded to the next higher number. We can round 650 to 700.
Round the numbers to the nearest 100’s. Follow the steps. 1.6
326 ___________ 872 ___________ 989 ___________
425 ___________ 103 ___________ 846 ___________
350 ___________ 275 ___________ 718 ___________
615 ___________ 555 ___________ 381 ___________
313 ___________ 949 ___________ 251 ___________
1.7
Circle the numbers in the hundreds’ place.
4 3 6
8 | Section 1
8 5 2
7 9
3 0 6
4
597
Unit 10 | REVIEW
Story Problems Read the story. Write the answer. 1.8
Jodie and Jeremy were going to summer camp. They were leaving at 6:30 in the morning. Was that A.M. or P.M? ____________
There were four buses going to camp. The first bus carried 39 children, the second bus 51, the third bus 48, and the fourth bus 42. How many children were there altogether?
____________
Jeremy counted mosquitoes every night. He counted 124 the first night, 58 the second night, and 137 the third night. How many mosquitoes did he count altogether? ____________
Jodie and Jeremy each saw a snake. Jodie said her snake was 14 inches long. Jeremy said his snake was 1 foot long. Who saw the longer snake? ____________ Section 1 | 9
REVIEW | Unit 10
There were 10 children in the bunk house. One night, they cooked hamburgers. Each child wanted 2 hamburgers. How many hamburgers did they cook? ____________
The last night, all of the children that went to camp roasted marshmallows. Each child ate two marshmallows. How many marshmallows were eaten altogether? ____________
When Jodie and Jeremy arrived home, 1 they each ate __ 6 of an apple pie. How much pie did they eat altogether?
____________
Before you take the Self Test, study what you have read and done. The Self Test will check what you remember. 10 | Section 1
Unit 10 | REVIEW
SELF TEST 1 Each answer = 1 point, except where otherwise noted 1.01 Add. Remember to carry.
63 + 22
78 + 35
563 + 215
675 + 227
46 + 51
89 + 65
18 + 32
381 + 462
325 141 + 520
244 302 + 451
1.02
Write in number words.
_
345 _____________________________________________
1.03
Round to the nearest 100.
567 _________
312 _________
750 _________
Section 1 | 11
REVIEW | Unit 10
1.04
Write the answer. (2 points)
There were 237 children at summer camp and each one wrote two letters. How many letters were written altogether?
13 16 12 | Section 1
Teacher Check
_____________ Initial
Date
____________
My Score
MAT0210 – Feb ‘17 Printing 804 N. 2nd Ave. E. Rock Rapids, IA 51246-1759 800-622-3070 www.aop.com
ISBN 978-1-58095-380-1
9 781580 953801
