We included **H****MH Into Math Grade 1 Answer Key**** PDF** **Module 4 Lesson 2 Represent Related Facts** to make students experts in learning maths.

## HMH Into Math Grade 1 Module 4 Lesson 2 Answer Key Represent Related Facts

I Can represent related facts in different ways. I can use related facts to find unknown numbers.

**Spark Your Learning**

There are 13 sailboats. 8 sailboats have striped sails. The other 5 have white sails. How can you write an addition equation about the sailboats?

How can you write a subtraction equation?

Answer:

Explanation:

There are 13 sailboats

8 sailboats have striped sails

The other 5 have white sails

The addition equation that match with the problem is

8 + 5 = 13

The subtraction equation that match with the problem is

13 – 8 = 5.

Read the problem to children. Have pairs choose tools and work together to show how to write an addition fact and a subtraction fact about the sailboats.

**Build Understanding**

There are 14 otters. 6 of them are in the water. The rest are on land. How many otters are on land? How can you use a concrete model to show the otters?

Answer:

B. How can you show all the equations that model the problem? Write the related facts.

____ + ___ = ____ ____ – ___ = ____

____ + ___ = ____ ____ – ___ = ____

Explanation:

There are 14 otters. 6 of them are in the water. The rest are on land

14 – 6 =

Start at 6. Count on till 14

I counted 8 more

6 + 8 = 14

So, 14 – 6 = 8

There are 8 otters on the land.

The equations that model the problem are

6 + 8 = 14, 14 – 6 = 8

8 + 6 = 14, 14 – 8 = 6

C. What is the same about the facts? What is different? Explain, related fact

Explanation:

The same things about the related facts is all the numbers are same and the different thing is the operations used.

**Turn and Talk** How did your concrete model help you write the related facts?

Answer:

Our concrete model helps us to find one equation.

We can write all the other related facts using the numbers in one equation.

**Step It Out**

1. How can you show all the equations that model the problem? Write the related facts.

Answer:

Explanation:

I wrote all the related facts by filling teh empty blanks.

A. Show the two addition facts. ____________

Answer:

Explanation:

In the first cube train i colored 9 green and 2 blue to show 9 + 2 = 11

In the second cube train i colored 2 green and 9 blue to show 2 + 9 = 11.

THINK: Show the addends in a different order.

B. Show the two subtraction facts.

THINK: Start with 11 Take away 2 or 9.

Answer:

Explanation:

I started with 11 cubes i took away 2 so, 9 are left

11 – 2 = 9

I started with 11 cubes i took away 9 so, 2 are left

11 – 9 = 2.

C. Use your to complete the related facts.

9 + ___ = 11 11 – 2 = ___

2 + 9 = ___ ___ – ___ = ___

Answer:

9 + 2 = 11, 11- 2 = 9

2 + 9 = 11, 11 – 9 = 2

Explanation:

I used the cubes i drew above to write all the equations.

**Check Understanding math Board**

**Use Complete the related facts.**

Question 1.

7 + ___ = 12 12 – ___ = 7

5 + ___ = 12 ___ – ___ = ___

Answer:

Explanation:

I used the above cubes to write the related facts

7 + 5 = 12, 12 – 5 = 7

5 + 7 = 12, 12 – 7 = 5.

Question 2.

**Model with Mathematics** Becca has 13 stickers. 7 of them are dog stickers. The rest are cat stickers.

How many cat stickers does she have?

____ cat stickers

- Write related facts to model the problem.

___ + ___ = ___ ___ – ___ = ___

___ + ___ = ___ ___ – ___ = ___

Answer:

13 – 7 = 6

6 cat stickers

Explanation:

Becca has 13 stickers

7 of them are dog stickers

The rest are cat stickers

Start at 7. Count on till 13

I counted 6 more

7 + 6 = 13

So, 13 – 7 = 6

There are 6 cat stickers

The related facts of the problem are

7 + 6 = 13, 13 – 7 = 6

6 + 7 = 13, 13 – 6 = 7.

**Complete the related facts.**

**Use if you need to.**

Question 3.

3 + 9 = ___ 12 – ___ = 9

9 + ___ = 12 ___ – ___ = ___

Answer:

3 + 9 = 12, 12 – 3 = 9

9 + 3 = 12, 12 – 9 = 3

Explanation:

Start at 9, Count on 3 more

9, 10, 11, 12

I reach at 12

3 + 9 = 12

So, the equation is 3 + 9 = 12

I can write the other related facts using the above equation.

Question 4.

4 + ____ = 11 11 – 4 = ___

___ + ___ = ____ 11 – 7 = ____

Answer:

4 + 7 = 11, 11 – 4 = 7

7 + 4 = 11, 11- 7 = 4

Explanation:

Start at 4. Count till 11

4, 5, 6, 7, 8, 9, 10, 11

I counted 7 more

4 + 7 = 11

So, the equation is 4 + 7 = 11

I can write the other related facts using the above equation.

**I’m in a Learning Mindset!**

What did I learn from the way others used related facts to find unknown numbers?