Melissa 635-119 User Manual download pdf (Page 97)

Answers

Grade 3 A10 Chapter 3

Answers (Lesson 3 –4)

Name Date

Grade 3 24 Chapter 3

Solve. Check for reasonableness.

1. Angel’s family is having dinner. The

pizza delivery will cost $9. Angel

has one $20 bill to pay for the

pizza. Is it reasonable for Angel to

expect about $10 in change from

the delivery person?

Explain.

2. Vanessa kicked the soccer ball at

the goal 117 times yesterday. She

kicked the ball 112 times today.

Is it reasonable for Vanessa to say

that she kicked the ball about 300

times?

Explain.

3. Adrian estimates that he will need to

bring 90 cookies for the third-grade

picnic. There are 32 students in

room 1, 31 students in room 2, and

31 students in room 3. Is 90 cookies

a reasonable estimate?

Explain.

4. Holly wants to buy her 3 favorite

songs. They cost $2, $1, and $3.

She estimates that she will need

$5 to buy the 3 songs. Is this a

reasonable estimate?

Explain.

5. Greg read 10 books last week

and 12 books this week. Is it a

reasonable estimate to say that he

read 20 books?

Explain.

6. Jacqueline wants to buy a book

and a CD. The book is $4. The CD

is $12. She estimates $15 will be

enough money. Is this a reasonable

estimate?

Explain.

YesYes

$20 - $9 = $11$20 - $9 = $11

NoNo

117 + 112 = 229.

Rounded to the nearest

hundred, 229 is about 200.

117 + 112 = 229.

Rounded to the nearest

hundred, 229 is about 200.

YesYes

32 + 31 + 31 = 94. Rounded

to the nearest ten, 94 is 90.

32 + 31 + 31 = 94. Rounded

to the nearest ten, 94 is 90.

NoNo

$2 + $3 + $1 = $6

YesYes

10 + 12 = 22.

Rounded to the

nearest ten, 22 is 20.

10 + 12 = 22.

Rounded to the

nearest ten, 22 is 20.

NoNo

$12 + $4 = $16$12 + $4 = $16

Reteach

Problem-Solving Skill (continued)

3–4

Name Date

Grade 3 25 Chapter 3

py g , p ,

Chapter Resources

Skills Practice

Problem-Solving Skill: Reasonable Answers

Solve. Check for reasonableness.

1. On Monday 321 people came for a craft show. On Tuesday

619 people came. Is it reasonable to say about 300 more

people came to the craft show on Tuesday?

Explain.

2. Seth’s class took a poll to find out what weekend activities

people enjoy. The table below shows their answers.

playground 8

movie 4

friend over 12

be with family 8

Seth estimated that about half his class likes to spend time

with their families. Is this reasonable?

Explain.

3. Using Seth’s class poll, is it reasonable to say that most of

the class likes to have friends over or spend time with family?

Explain.

4. Dominique called her grandmother 17 times in July. She

estimates that she called about half the days in July. Is

this reasonable?

Explain.

rounded to the nearest hundred, 321 is 300.

619 is rounded to 600. 600 - 300 = 300.

rounded to the nearest hundred, 321 is 300.

619 is rounded to 600. 600 - 300 = 300.

yesyes

8 + 4 + 12 + 8 = 32. Rounded to the

nearest 10 this is 30. Half would be 15.

8 + 4 + 12 + 8 = 32. Rounded to the

nearest 10 this is 30. Half would be 15.

nono

YesYes

12 + 8 = 20. About half the class is 15. 20 is

more than half.

12 + 8 = 20. About half the class is 15. 20 is

more than half.

yesyes

31 rounded to the nearest 10

is 30. 15 is half of 30. 17 is close to 15.

31 rounded to the nearest 10

is 30. 15 is half of 30. 17 is close to 15.

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Melissa 635-119 User Manual Page 97

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