G1 U9 L11 TE
Applied MP
MPs * Embedded MP
Group Math Task Grade 1 · Unit 9 · Lesson 11
1
2
3
4
5
* * *
6
7
*
MC: 1.OA.5, 1.OA.6 Student Journal Pages
(none)
Today, I will work in a small group to show understanding of the subtraction strategies.
Materials One student recording sheet for each group. One marker or crayon for each group. One number line for each group.
Prep
The recording sheet is divided into four sections.
Example:
1
2
3
4
Check for Understanding
Are students able to collaborate in a small group?
Does the student’s work show an understanding of these strategies: a number line, counting back, and adding to subtract?
Does the student’s work show an understanding of subtraction?
Are students able to articulate the work?
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
8
*
Answer Key: VI 1.
HW 7- 4 = 3
1. 8– 4 = 4
2. 12 – 3 = 9
2. 13—5 = 8
3. 9 +7=16
3. 17—8 = 9
4. 13 - 8 = 5
4. 14—7 = 7
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Verbal Instruction *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Teacher: With input and assistance from the group, students will work to show an understanding of subtraction strategies.
Section 1 :
Give students the following instructions: Write the equation 7—4=. Use the count back strategy to find the difference.
Section 2:
Give the following instructions: Write the equation 12 – 3 =. Use the number line to find the difference.
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Verbal Instruction *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Teacher: With input and assistance from the group, students will work to show an understanding of subtraction strategies.
Section 3 :
Give students the following instructions:
Write the equation 16 — 9. Use the unknown addend strategy to find the difference. Write the addition equation you would use.
Section 4:
Give students the following instructions:
Write the equation 13 — 8. Find the difference using one of the previous strategies.
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Group Presentation *MP3: Do you agree/disagree with what
said?
*MP6: How do you know your answers are correct/reasonable?
Sample Probing Questions
For section 4, what strategy did you use? Why?
How did your group prove the subtraction problems?
Which strategy do you prefer using? Why?
What other way could you find the differences?
Reflective Closure
Were most groups able to complete the tasks?
Were students able to work together as a group?
Were students able to verbalize our mathematical content and practice?
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Name: ____________________________ Date: ______________________________
Directions: Review.
Write the equation 8 – 4 =. Use the count back strategy to find the difference.
2. Write the equation 13 – 5 =. Use the number line to find the difference.
0
1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16
Write the equation 17 - 8 =. Use the unknown addend strategy to find the difference. Write the addition equation you would use.
+
=
4. Write the equation 14 - 7 =. Find the difference using one of the previous strategies.
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
MPs * Embedded MP
Group Math Task Grade 1 · Unit 9 · Lesson 11
1
2
3
4
5
* * *
6
7
*
MC: 1.OA.5, 1.OA.6 Student Journal Pages
(none)
Today, I will work in a small group to show understanding of the subtraction strategies.
Materials One student recording sheet for each group. One marker or crayon for each group. One number line for each group.
Prep
The recording sheet is divided into four sections.
Example:
1
2
3
4
Check for Understanding
Are students able to collaborate in a small group?
Does the student’s work show an understanding of these strategies: a number line, counting back, and adding to subtract?
Does the student’s work show an understanding of subtraction?
Are students able to articulate the work?
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
8
*
Answer Key: VI 1.
HW 7- 4 = 3
1. 8– 4 = 4
2. 12 – 3 = 9
2. 13—5 = 8
3. 9 +7=16
3. 17—8 = 9
4. 13 - 8 = 5
4. 14—7 = 7
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Verbal Instruction *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Teacher: With input and assistance from the group, students will work to show an understanding of subtraction strategies.
Section 1 :
Give students the following instructions: Write the equation 7—4=. Use the count back strategy to find the difference.
Section 2:
Give the following instructions: Write the equation 12 – 3 =. Use the number line to find the difference.
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Verbal Instruction *MP1: Make sense of the problem and persevere in solving it! *MP8: Find a strategy to help solve the problem. Teacher: With input and assistance from the group, students will work to show an understanding of subtraction strategies.
Section 3 :
Give students the following instructions:
Write the equation 16 — 9. Use the unknown addend strategy to find the difference. Write the addition equation you would use.
Section 4:
Give students the following instructions:
Write the equation 13 — 8. Find the difference using one of the previous strategies.
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Group Presentation *MP3: Do you agree/disagree with what
said?
*MP6: How do you know your answers are correct/reasonable?
Sample Probing Questions
For section 4, what strategy did you use? Why?
How did your group prove the subtraction problems?
Which strategy do you prefer using? Why?
What other way could you find the differences?
Reflective Closure
Were most groups able to complete the tasks?
Were students able to work together as a group?
Were students able to verbalize our mathematical content and practice?
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
Name: ____________________________ Date: ______________________________
Directions: Review.
Write the equation 8 – 4 =. Use the count back strategy to find the difference.
2. Write the equation 13 – 5 =. Use the number line to find the difference.
0
1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16
Write the equation 17 - 8 =. Use the unknown addend strategy to find the difference. Write the addition equation you would use.
+
=
4. Write the equation 14 - 7 =. Find the difference using one of the previous strategies.
Copyright © Swun Math
Grade 1 Unit 9 Lesson 11 GMT TE
