We included HMH Into Math Grade 1 Answer Key PDF Module 4 Addition and Subtraction Relationship to make students experts in learning maths.

Birth Nest Math

Find each unknown sum or difference. Write a sum on the nest. Write a difference on the bird.

Explanation:
I wrote the sum on the nest and the difference on the bird.
I colored the sums
I colored the rest that is the differences
If both birds show doubles, I colored them

Colour the sums If both birds show doubles, color them Color the rest of the birds

Turn and Talk

What strategies did you use? Give an example to explain.

Complete these problems to review prior concepts and skills you will need for this module.

Use to show the equation. Color to match. Write the sum.

Question 1.

Explanation:
I used red and blue cubes to show the equations
To show 2 + 3
I colored 2 cubes red and 3 cubes blue
To show 3 + 2
I colored 3 cubes red and 2 cubes blue
So, 2 + 3 = 3 + 2 = 5.

Count On

Count on to add. Write the sum.

Question 2.
6 + 1 = ___
6 + 1 = 7

Explanation:
Start at 6. Count on 1 more
6, 7
So, 6 + 1 = 7.

Question 3.
7 + 2 = ___
7 + 2 = 9

Explanation:
Start at 7. Count on 2 more
7, 8, 9
So, 7 + 2 = 9

Question 4.
9 + 3 = ___
9 + 3 = 12

Explanation:
Start at 9. Count on 3 more
9, 10, 11, 12
So, 9 + 3 = 12.

Count Back

Count back to subtract. Write the difference.

Question 5.
7 – 3 = ___
7 – 3 = 4

Explanation:
Start at 7
Count back 3
7, 6, 5, 4
I reached at 4
So, 7 – 3 = 4.

Question 6.
11 – 2 = __
11 – 2 = 9

Explanation:
Start at 11
Count back 2
11, 10, 9
I reached at 9
So, 11 – 2 = 9.

Question 7.
8 – 1 = ___