G1 U10 L8 TE
Applied MP
MPs * Embedded MP
Procedural Lesson Grade 1 · Unit 10 · Lesson 8
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5
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8
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MC: 1.OA.1 Student Journal Pages
115-120
Today, I will solve word problems with the start unknown.
Vocabulary
Teacher Resources
Take From Start Unknown – Word Problems: There were some horses in a field. Six horses ran away, and now there are 3 horses. How many horses were in the field to begin with?
W-6=3
Considerations: Students need to be exposed to many ways to represent the unknown (empty box, letters, and symbols). Steps: 1. Listen carefully to the numbers in the word problem. 2. Use the numbers to write an equation using a symbol or letter to represent the unknown. 3. Solve for the unknown.
Unknown Solve for the unknown:
6+3=9 W= 9
Copyright © Swun Math
Application of MPs: MP2: What math symbol can you use today? MP6: How do you know your answers are correct? MP7: What steps help you solve the problems?
Grade 1 Unit 10 Lesson 8 P TE
Answer Key: I/M
SGP
FCU
1. W-2= 6, 6 +2=8
1. Z-6= 3, 6 +3=9
1.
W= 8
2.
-8= 3, 8 +3=11
Z= 9
2. -4= 8, 4 +8=12
= 11
= 12
SP
1. V-8= 6, 8 +6= 14 -10= 3, V= 14 10 +3=13 = 13
2. W-7= 3, 7 +3=10
2. -8= 8, 8 +8=16
W= 10
= 16
3. B-9= 5, 9 + 5= 14 B= 14
4. X-2= 9, 2 + 9= 11 X= 11
5.
- 5= 8, 5 + 8= 13 = 13
6. No; X= 8
CH
HW
1. - 5= 20,
1. H-5= 9, 5 + 9= 14
5 +20=25 = 25
2. Z-10= 10,
H= 14
2. - 6= 4, 6 +4=10
10 +10=20 Z= 20
= 10
3.
- 2= 9, 2 + 9= 11 = 11
4. M-8= 6, 8 + 6= 14 M= 14
5. No; V=13
6. - 10= 20, 10 +20=30 = 30
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
/ *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Write the equation and solve for the unknown.
1. There are some ducks. Two ducks fly away. There are 6 ducks left. How many ducks were there to begin with?
W= 2. Dan has some games. He gives 8 games to Todd. Now he has 3 games. How many games did Dan begin with?
= MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
/ Directions: Write the equation and solve for the unknown.
1. Chris has some dimes. He lends 6 dimes to his sister. Now he has 3 dimes left. How many dimes did he start with?
Z= 2. Helen has a bunch of flowers. She gives 4 flowers away. Now she has 8 flowers. How many flowers did Helen begin with?
= MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Directions: Write the equation and solve for the unknown.
1. Frankie takes jump ropes to recess. He gives 10 jump ropes away. Now he has 3 jump ropes left. How many jump ropes did Frankie begin with?
= 2. There are pigs in the barn. Seven pigs go outside and only 3 pigs are left. How many pigs started in the barn?
W=
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Name: ____________________________ Directions: Write the equation and solve for the unknown.
Date: ______________________________
1. Carmen sees a swarm of butterflies. Eight butterflies fly away. There are 6 butterflies left. How many butterflies did Carmen see to begin with?
V= 2. Sonia’s mom made hair bows. She gave 8 bows to Sonia. She only has 8 bows left. How many bows did she make?
= 3. Ella had erasers in her pencil box. Nine erasers got lost, and now she only has 5 left. How many erasers did she start with in her pencil box?
B= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Directions: Write the equation and solve for the unknown.
4. Sidney has a plate of cookies. She gives 2 cookies away and has 9 cookies left. How many cookies did she begin with?
X= 5. Ava has a pack of markers. She loses 5 markers. Now she has 8 markers. How many markers did Ava begin with?
= 6. Record the equation used to solve the following word problem. Can X= 0? If not, solve for the unknown. Students took handballs to recess. Four handballs went over the wall. Now, 4 handballs are left. How many handballs did they take to recess to begin with?
X=0
Yes
Copyright © Swun Math
No
X= Grade 1 Unit 10 Lesson 8 P TE
Directions: Write the equation and solve for the unknown.
1. Jocelyn has a bag full of beads. She gives 5 beads to her cousin. She has 20 beads left. How many beads did Jocelyn begin with?
= 2. Troy has blocks in a bag. He gives 10 blocks to his friend and now he has 10 left. How many blocks did he have in his bag to begin with?
Z= *MP3: Do you agree/disagree with what
said?
*MP6: How do you know your answers are correct/reasonable?
Recap today’s lesson with one or more of the following MP questions: MP2: What math symbol did you use today? MP6: How did you know your answers were correct? MP7: What steps helped you solve the problems?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Name: ____________________________ Date: ______________________________
Directions: Solve for the unknown.
1. Deanna has stuffed animals on her bed. Her sister takes 5 stuffed animals. Now Deanna has 9 stuffed animals. How many stuffed animals did Deanna begin with?
H= 2. Maribel picked flowers. She gave 6 to her mom, and now she has 4 flowers left. How many did she pick?
= 3. Angie had some books. Two books got wet in the rain. Now she has 9 dry books. How many books did Angie begin with?
= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Directions: Solve for the unknown.
4. Katie drew some hearts. She erased 8 hearts and now has 6 hearts left. How many hearts did she draw?
M= 5. Record the equation used to solve the following word problem. Can V = 1? If not, solve for the unknown. The park has swings. Six swings are broken. Now there are only 7 swings. How many swings were there to begin with?
V=1
Yes
No
V=
6. Jazmin had lots of markers. Ten dried up and she has 20 markers left. How many markers did she start with?
= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
MPs * Embedded MP
Procedural Lesson Grade 1 · Unit 10 · Lesson 8
1
2
3
4
*
*
*
5
6
7
8
*
*
MC: 1.OA.1 Student Journal Pages
115-120
Today, I will solve word problems with the start unknown.
Vocabulary
Teacher Resources
Take From Start Unknown – Word Problems: There were some horses in a field. Six horses ran away, and now there are 3 horses. How many horses were in the field to begin with?
W-6=3
Considerations: Students need to be exposed to many ways to represent the unknown (empty box, letters, and symbols). Steps: 1. Listen carefully to the numbers in the word problem. 2. Use the numbers to write an equation using a symbol or letter to represent the unknown. 3. Solve for the unknown.
Unknown Solve for the unknown:
6+3=9 W= 9
Copyright © Swun Math
Application of MPs: MP2: What math symbol can you use today? MP6: How do you know your answers are correct? MP7: What steps help you solve the problems?
Grade 1 Unit 10 Lesson 8 P TE
Answer Key: I/M
SGP
FCU
1. W-2= 6, 6 +2=8
1. Z-6= 3, 6 +3=9
1.
W= 8
2.
-8= 3, 8 +3=11
Z= 9
2. -4= 8, 4 +8=12
= 11
= 12
SP
1. V-8= 6, 8 +6= 14 -10= 3, V= 14 10 +3=13 = 13
2. W-7= 3, 7 +3=10
2. -8= 8, 8 +8=16
W= 10
= 16
3. B-9= 5, 9 + 5= 14 B= 14
4. X-2= 9, 2 + 9= 11 X= 11
5.
- 5= 8, 5 + 8= 13 = 13
6. No; X= 8
CH
HW
1. - 5= 20,
1. H-5= 9, 5 + 9= 14
5 +20=25 = 25
2. Z-10= 10,
H= 14
2. - 6= 4, 6 +4=10
10 +10=20 Z= 20
= 10
3.
- 2= 9, 2 + 9= 11 = 11
4. M-8= 6, 8 + 6= 14 M= 14
5. No; V=13
6. - 10= 20, 10 +20=30 = 30
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
/ *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Directions: Write the equation and solve for the unknown.
1. There are some ducks. Two ducks fly away. There are 6 ducks left. How many ducks were there to begin with?
W= 2. Dan has some games. He gives 8 games to Todd. Now he has 3 games. How many games did Dan begin with?
= MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
/ Directions: Write the equation and solve for the unknown.
1. Chris has some dimes. He lends 6 dimes to his sister. Now he has 3 dimes left. How many dimes did he start with?
Z= 2. Helen has a bunch of flowers. She gives 4 flowers away. Now she has 8 flowers. How many flowers did Helen begin with?
= MP2: What math symbol did you use today? MP6: How do you know your answers are correct? MP7: What steps helped you solve the problems? Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Directions: Write the equation and solve for the unknown.
1. Frankie takes jump ropes to recess. He gives 10 jump ropes away. Now he has 3 jump ropes left. How many jump ropes did Frankie begin with?
= 2. There are pigs in the barn. Seven pigs go outside and only 3 pigs are left. How many pigs started in the barn?
W=
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Name: ____________________________ Directions: Write the equation and solve for the unknown.
Date: ______________________________
1. Carmen sees a swarm of butterflies. Eight butterflies fly away. There are 6 butterflies left. How many butterflies did Carmen see to begin with?
V= 2. Sonia’s mom made hair bows. She gave 8 bows to Sonia. She only has 8 bows left. How many bows did she make?
= 3. Ella had erasers in her pencil box. Nine erasers got lost, and now she only has 5 left. How many erasers did she start with in her pencil box?
B= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Directions: Write the equation and solve for the unknown.
4. Sidney has a plate of cookies. She gives 2 cookies away and has 9 cookies left. How many cookies did she begin with?
X= 5. Ava has a pack of markers. She loses 5 markers. Now she has 8 markers. How many markers did Ava begin with?
= 6. Record the equation used to solve the following word problem. Can X= 0? If not, solve for the unknown. Students took handballs to recess. Four handballs went over the wall. Now, 4 handballs are left. How many handballs did they take to recess to begin with?
X=0
Yes
Copyright © Swun Math
No
X= Grade 1 Unit 10 Lesson 8 P TE
Directions: Write the equation and solve for the unknown.
1. Jocelyn has a bag full of beads. She gives 5 beads to her cousin. She has 20 beads left. How many beads did Jocelyn begin with?
= 2. Troy has blocks in a bag. He gives 10 blocks to his friend and now he has 10 left. How many blocks did he have in his bag to begin with?
Z= *MP3: Do you agree/disagree with what
said?
*MP6: How do you know your answers are correct/reasonable?
Recap today’s lesson with one or more of the following MP questions: MP2: What math symbol did you use today? MP6: How did you know your answers were correct? MP7: What steps helped you solve the problems?
Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Name: ____________________________ Date: ______________________________
Directions: Solve for the unknown.
1. Deanna has stuffed animals on her bed. Her sister takes 5 stuffed animals. Now Deanna has 9 stuffed animals. How many stuffed animals did Deanna begin with?
H= 2. Maribel picked flowers. She gave 6 to her mom, and now she has 4 flowers left. How many did she pick?
= 3. Angie had some books. Two books got wet in the rain. Now she has 9 dry books. How many books did Angie begin with?
= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
Directions: Solve for the unknown.
4. Katie drew some hearts. She erased 8 hearts and now has 6 hearts left. How many hearts did she draw?
M= 5. Record the equation used to solve the following word problem. Can V = 1? If not, solve for the unknown. The park has swings. Six swings are broken. Now there are only 7 swings. How many swings were there to begin with?
V=1
Yes
No
V=
6. Jazmin had lots of markers. Ten dried up and she has 20 markers left. How many markers did she start with?
= Copyright © Swun Math
Grade 1 Unit 10 Lesson 8 P TE
