We included HMH Into Math Grade 2 Answer Key PDF Module 13 Develop Addition and Subtraction Fluency to make students experts in learning maths.

Add and Subtract with Quick Pictures
What numbers are represented by these quick pictures?
42 and 56
Explanation:
Bar sticks represents tens and circles represent ones.
42 means 4 tens and 2 ones.
56 means 5 tens and 6 ones.

Write and solve an addition equation using the numbers from the quick pictures.

Write and solve a subtraction equation using the numbers from the quick pictures.
42 + 56 = 98
Write and solve a subtraction equation using the numbers from the quick pictures.
56 – 42 = 14

Turn and Talk

Quick pictures are the symbols or objects used in addition and subtraction to understand quickly.
Explanation:

22 + 36 = 58
36 – 22 = 14

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

Mental Math

Use the hundred chart to solve the problems.

Question 1.
30 + 60 = ___
90
Explanation:
Using hundred chart

30 + 60 = 90
3 tens + 6 tens=9 tens

Question 2.
70 – 50 = ___
20
Explanation:

Question 3.
90 – 20 = ____
70
Explanation:

90 – 20 =70

Question 4.
8 + 6 = ____ ___ = 6 + 8
8 + 6 = 14 = 6 + 8
Explanation:
Adding two or more numbers to find the sum is known as addition.
the sum will be same.

Question 5.
____ = 9 + 8 9 + 8 = _____
17 = 9 + 8 9 + 8 = 17
Explanation:
Adding two or more numbers to find the sum is known as addition.
the sum will be same.

Subtraction Facts

Subtract to solve.

Question 6.
___ = 16 – 9; 16 – 7 = ____
7 = 16 – 9; 16 – 7 = 9
Explanation:
subtraction fact is
to find the missing addend in the blow equation we should subtract the given addend from sum
sum is 16
16 – 9 = 7
16 – 7 = 9

Question 7.
18 – 9 = ___ ___ = 18 – 9