We included HMH Into Math Grade 2 Answer Key PDF Module 13 Develop Addition and Subtraction Fluency to make students experts in learning maths.
HMH Into Math Grade 2 Module 13 Answer Key Develop Addition and Subtraction Fluency
Add and Subtract with Quick Pictures
What numbers are represented by these quick pictures?
Answer:
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.
Answer:
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
How are quick pictures helpful when you are adding two-digit numbers?
Answer:
Quick pictures are the symbols or objects used in addition and subtraction to understand quickly.
Explanation:
22 + 36 = 58
36 – 22 = 14
Are You Ready?
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 = ___
Answer:
90
Explanation:
Using hundred chart
30 + 60 = 90
3 tens + 6 tens=9 tens
Question 2.
70 – 50 = ___
Answer:
20
Explanation:
Question 3.
90 – 20 = ____
Answer:
70
Explanation:
90 – 20 =70
Addition Facts
Add to solve.
Question 4.
8 + 6 = ____ ___ = 6 + 8
Answer:
8 + 6 = 14 = 6 + 8
Explanation:
Adding two or more numbers to find the sum is known as addition.
In additions addends can be added from left to right or right to left,
the sum will be same.
Question 5.
____ = 9 + 8 9 + 8 = _____
Answer:
17 = 9 + 8 9 + 8 = 17
Explanation:
Adding two or more numbers to find the sum is known as addition.
In additions addends can be added from left to right or right to left,
the sum will be same.
Subtraction Facts
Subtract to solve.
Question 6.
___ = 16 – 9; 16 – 7 = ____
Answer:
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
one addend is 9
another addend is
16 – 9 = 7
16 – 7 = 9
Question 7.
18 – 9 = ___ ___ = 18 – 9
Answer:
18 – 9 = 9; 9 = 18 – 9
Explanation:
subtraction fact is
to find the missing addend in the blow equation we should subtract the given addend from sum
sum is 18
one addend is 9
another addend is
18 – 9 = 9
9 + 9 = 18