We included **H****MH Into Math Grade 1 Answer Key**** PDF** **Module 6 Lesson 4 Represent Total Unknown Problems with a Visual Model** to make students experts in learning maths.

## HMH Into Math Grade 1 Module 6 Lesson 4 Answer Key Represent Total Unknown Problems with a Visual Model

I Can make a visual model to solve word problems when the total is unknown.

**Spark Your Learning**

Ayden sees 9 robins. Gina sees 5 robins. How many robins do they see?

Show how to solve the problem.

Answer:

Explanation:

Ayden sees 9 robins. Gina sees 5 robins

The addition equation that solves the problem is

9 + 5 = 14

Therefore, Ayden and Gina saw 14 robins.

Read the problem to children, Hove children solve the problem and draw to show their thinking.

**Build Understanding**

There are 6 cats and 7 kittens playing with yarn. How many cats and kittens altogether are playing with yarn?

A. How can you use a concrete model and bar model to show this problem?

B. How does your concrete model match the bar model?

C. How many cats and kittens altogether are playing with yam?

___ cats and kittens

Answer:

Explanation:

There are 6 cats and 7 kittens playing with yarn

The addition equation that solves the problem is

6 + 7 = 13

Therefore, 13 cats and kittens altogether are playing with yarn.

**Turn and Talk** How does a bar model help you understand the problem?

**Step It Out**

1. A movie theater has 5 large boxes of popcorn and 7 small boxes of popcorn. How many boxes of popcorn are there?

Use a bar model to solve this problem.

A. Use Make a concrete model to match the bar model. Color to show what you did. Write the total.

B. Use the bar model to help you write an equation that solves the problem.

Equation: _____

C. There are ____ boxes of popcorn.

Answer:

Explanation:

A movie theater has 5 large boxes of popcorn and 7 small boxes of popcorn

The addition equation that solves the problem is

5 + 7 = 12

Therefore, there are 12 boxes of popcorn.

**Turn and Talk** How does each part of the bar model represent the problem?

**Step It Out**

2. Anna has 4 boxes of juice. Rick has 7 boxes of juice. How many boxes of juice do they have?

A. Write how many boxes of juice each child has in the bar model. Then write the total.

B. Use the bar model to write an equation that solves the problem.

Equation: ____

Anna and Rick have ___ boxes of juice.

Answer:

Explanation:

Anna has 4 boxes of juice

Rick has 7 boxes of juice

The addition equation that solves the problem is

4 + 7 = 11

Therefore, Anna and Rick have 11 boxes of juice.

**Check Understanding Math Board**

**Use a bar model to solve the problem.**

Question 1.

Jesse has 3 pears and 9 apples. How many pears and apples does he have altogether?

Equation: ____

Jesse has ___ pears and apples.

Answer:

Explanation:

Jesse has 3 pears and 9 apples.

The addition equation that solves the problem is

3 + 9 = 12

There are 12 pears and apples.

**On Your Own**

**Color the cubes to match the bar model. Then write an equation to solve.**

Question 2.

**Model with Mathematics** There are 5 big dogs and 8 little dogs at the park. How many dogs are at the park?

Equation: _____

There are ___ dogs at the dog park.

Answer:

Explanation:

There are 5 big dogs and 8 little dogs at the park

The addition equation that helps to solve the problem is

5 + 8 = 13

There are 13 dogs at the dog park.

Question 3.

**Open Ended** Complete the bar model. Write a story problem to match the bar model.

Answer:

7 + 9 = 16.

Explanation:

There are 7 books on the table and 9 books on the chair.

Find the total number of books using a bar model.

**Model with Mathematics Use a bar model to solve the problem.**

Question 4.

There are 8 school buses and 9 cars outside. How many buses and cars are outside?

Equation: ___

There are ___ buses and cars outside.

Answer:

Explanation:

There are 8 school buses and 9 cars outside

The addition equation that matches with the problem is

8 + 9 = 14

There are 14 buses and cars outside.

Question 5.

There are 6 large dolls and 7 small dolls. How many dolls are there?

Equation: _____

There are ___ dolls.

Answer:

Explanation:

There are 6 large dolls and 7 small dolls

The addition that matches with the problem is

6 + 7 = 13

There are 13 dolls.

**I’m in a Learning Mindset!**

What tools can I use to solve Problem 4?

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