We included HMH Into Math Grade 1 Answer Key PDF Module 13 Two-Digit Addition and Subtraction to make students experts in learning maths.

Write addends to complete each puzzle.

Turn and Talk

How could you write three different ways to make a sum of 20?
11 + 7 = 20, 10 + 10 = 20 and 12 + 8 = 20
These are 3 of the ways to write make a sum of 20.

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

Circle the two groups to put them together. Complete the addition equation.

Question 1.

Explanation:
There are 5 yellow flowers and
There are 5 pink flowers
5 + 5 = 10
So, there are 10 flowers in all
I drew a circle around both the groups to put them together.

Count Groups to 20

Circle groups of 10. Write how many.

Question 2.

Explanation:
I drew a circle around a group of 10
There are 8 more left
10 + 8 = 18
So, There are 18 counters in all.

Question 3.

Explanation:
I drew a circle around a group of 10
There are 3 more left
10 + 3 = 13
So, There are 13 counters in all.

Tens

Write the number.

Question 4.

The number is 30

Explanation:
There are 3 ten blocks
3 tens is 30
So, the number is 30.

Question 5.