All the solutions provided in **McGraw Hill My Math Grade 1 Answer Key PDF Chapter 8 Lesson 4 Problem-Solving Strategy: Guess, Check, and Revise **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 8 Lesson 4 Problem-Solving Strategy: Guess, Check, and Revise

The carrot is less than 10 cubes long. It is more than 2 cubes long. About how many cubes long is the carrot

1. Understand

Underline what you know.

Circle what you need to find.

2. Plan

How will I solve the problem?

3. Solve

I will guess, check, and revise.

4. Check

Is my answer reasonable? Explain.

Answer:

Yes, my answer is reasonable as the estimation and action has only one cube different

**Practice the Strategy**

The container is less than 9 cubes long. It is more than 1 cube long. About how long is the container?

1. Understand

Underline what you know.

Circle what you need to find.

2. Plan

How will I solve the problem?

3. Solve

I will…

Guess: about _________

Measure: about ___________

4. Check

Is my answer reasonable? Explain,

Answer:

Explanation:

Guess: about 5

Measure: about 6

The container is 6 cubes long

According to the question the container is more than one cube and less than 9 cubes

so, my answer is reasonable.

**Apply the Strategy**

**About how many long is the object? Guess. Then measure. Revise if needed.**

Question 1.

Guess: about _________

Measure: about ___________

Answer:

Explanation:

Guess: about 12

Measure: about 10

The corn is measuring about 10 cubes long

Question 2.

Guess: about _________

Measure: about ___________

Answer:

Explanation:

Guess: about 3

Measure: about 4

The broccoli is about 4 cubes long

Question 3.

Guess: about _________

Measure: about ___________

Answer:

Explanation:

Guess: about 7

Measure: about 8

The Lettice is about 8 cubes long

**Review the Strategies**

Choose a strategy

- Guess, check, and revise.
- Draw a diagram.
- Act it out.

Question 4.

The pea pod ¡s more than 1 cube long. It is less than 4 cubes long. About how many cubes long is the pea pod?

about __________

Answer:

Explanation:

about 3

The pea pod ¡s more than 1 cube long.

It is less than 4 cubes long.

According to the conditions the pea pod is measuring 3 cubes

Question 5.

A watermelon grows 1 cube longer each day. On Monday, it was 6 cubes long. How many cubes long will the watermelon be on Wednesday?

__________

Answer:

8 cubes long

On Wednesday the watermelon length is about 8 cubes long.

Question 6.

Sergio picks a bean that is 5 cubes long. Perla picks a bean that is 2 cubes long. How much longer is the bean that Sergio picked?

__________

Answer:

3

Sergio picks a bean that is 5 cubes long.

Perla picks a bean that is 2 cubes long.

5 – 2 = 3

3 cubes longer is the bean that Sergio picked.

### McGraw Hill My Math Grade 1 Chapter 8 Lesson 4 My Homework Answer Key

**Problem Solving**

**About how many pennies long is the object? Guess. Then measure. Revise if needed.**

Question 1.

Guess: about ____________ pennies

Measure: about ____________ pennies

Answer:

Explanation:

Guess: about 2 pennies

Measure: about 3 pennies

The hockey stick is measuring about 3 pennies

Question 2.

Guess: about ____________ pennies

Measure: about ____________ pennies

Answer:

Explanation:

Guess: about 2 pennies

Measure: about 2 pennies

The ball is measuring about 2 pennies

Question 3.

Guess: about ____________ pennies

Measure: about ____________ pennies

Answer:

Explanation:

Guess: about 5 pennies

Measure: about 4 pennies

The net is measuring about 4 pennies

**Math at Home** Ask your child to guess the length of his or her own shoe in pennies. Then check using actual pennies.

Answer: