# Into Math Grade 1 Module 12 Answer Key Understand Addition and Subtraction with Tens and Ones

We included HMH Into Math Grade 1 Answer Key PDF Module 12 Understand Addition and Subtraction with Tens and Ones to make students experts in learning maths.

## HMH Into Math Grade 1 Module 12 Answer Key Understand Addition and Subtraction with Tens and Ones Veterinarian

Do you have a pet? How do you keep your pet healthy? Where might you take your pet if it was ill?

Veterinarians provide regular checkup to ensure that pets stay healthy. They also take care of pets when they are sick.

Work with a partner. Look at the picture. Ask as many questions as you can.

Learning Mindset Bounce Back Notices Others There may be times when our friends need our help. We may notice that they look sad, frustrated, or confused. When we notice the reactions of others, we can help them to solve a problem or complete a task.

Reflect

Question 1.
Look at the picture. What do you notice about the children in the picture? Describe any clues you see.
The children in the picture are playing and helping each other.

Question 2.
Think of a time when you helped someone else. How did you know they needed help?
I helped my friend when she is in need of a pencil to write.

Surfboard Search

Sammy Seal rides a surfboard that has an answer of 17. Solve each equation. Color the surfboard that belongs to Sammy.
Question 1.
8 + 4 = _________
8 + 4 = 12

Explanation:
Make ten:
8 + 4 =
8 + 2 + 2
= 10 + 2
= 12
So, 8+ 4 = 12.

Question 2.
18 – 9 = _________
18 – 9 = 9

Explanation:
Doubles fact:
9 + 9 = 18
So, 18 – 9 = 9.

Question 3.
_________ = 6 + 7
6 + 7 = 13

Explanation:
Doubles fact:
6 + 6 = 12 and 1 more
So, 6+ 7 = 12.

Question 4.
5 + 8 = _________
5 + 8 = 13

Explanation:
Start at 8, Count on more 5
8 after 9, 10, 11, 12 and 13
So, 8+ 5 = 13.

Question 5.
_________ = 9 + 8
17 = 9 + 8

Explanation:
Doubles fact:
8 + 8 = 16 and 1 more
So, 9 + 8 = 17.

Question 6.
15 – 8 = _________
15 – 8 = 7

Explanation:
Start at 15, Count back by 1’s
Count 8 times
15 before 14, 13, 12, 11, 10, 9 and 8
I stopped at 8
So, 15 – 8 = 7.

Question 7.
_________ = 16 – 9
7 = 16 – 9

Explanation:
Make 10:
16 – 9 =
= 16 – 6 – 3
= 10 – 3
= 7
So, 16 – 9 = 3.

Question 8.
11 – 7 = _________
11 – 7 = 4

Explanation:
Make 10:
11 – 7 =
= 11 – 1 – 6
= 10 – 6
= 4
So, 11 – 7 = 4.

Turn and Talk

What strategies did you use to solve these equations?
I used counting forward and back by 10’s, making tens to add and subtract and doubles fact.

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

Question 1.
Use and to add and subtract. Complete the equations.  Explanation:
I counted the cubes and wrote the numbers to complete the equations
7 + 2 = 9
9 – 2 = 7.

Count Groups to 20

Circle groups of 10. Write how many.

Question 2.  Explanation:
I drew a circle around the group of 10’s.
There is 1 group of tens and 4 more are left
10 + 4 = 14
There are 14 counters in all.

Question 3.  Explanation:
I drew a circle around the group of 10’s.
There are 2 groups of 10’s
10 + 10 = 20
So, there are 20 strawberries in all.  