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.

**STEM Task:**

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.

Answer:

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?

Answer:

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 = _________

Answer:

8 + 4 = 12

Explanation:

Make ten:

8 + 4 =

8 + 2 + 2

= 10 + 2

= 12

So, 8+ 4 = 12.

Question 2.

18 – 9 = _________

Answer:

18 – 9 = 9

Explanation:

Doubles fact:

9 + 9 = 18

So, 18 – 9 = 9.

Question 3.

_________ = 6 + 7

Answer:

6 + 7 = 13

Explanation:

Doubles fact:

6 + 6 = 12 and 1 more

So, 6+ 7 = 12.

Question 4.

5 + 8 = _________

Answer:

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

Answer:

17 = 9 + 8

Explanation:

Doubles fact:

8 + 8 = 16 and 1 more

So, 9 + 8 = 17.

Question 6.

15 – 8 = _________

Answer:

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

Answer:

7 = 16 – 9

Explanation:

Make 10:

16 – 9 =

= 16 – 6 – 3

= 10 – 3

= 7

So, 16 – 9 = 3.

Question 8.

11 – 7 = _________

Answer:

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?

Answer:

I used counting forward and back by 10’s, making tens to add and subtract and doubles fact.

**Are You Ready?**

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

**Add and Subtract**

Question 1.

Use and to add and subtract. Complete the equations.

Answer:

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.

Answer:

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.

Answer:

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.

**Add in Any Order**

Question 4.

Write the sum. Change the order of the addends. Write the addition equation.

Answer:

Explanation:

The sum of 1 and 9 is 10

I wrote the sum 1 + 9 = 10

I changed the order of addends and wrote the equation 9 + 1 = 10.