Question 1

A credit card is 0.76 mm thick. How thick is a stack of 10^3 credit cards? Explain

Accepted Answer

760 mm.  I moved the decimal point three places to the right.

Question 2

Leo has 59 bricks each measuring 0.19 m long. He lines up the bricks to make a row. Estimate the length of Leo’s row of bricks. Write an equation to model your work.

Accepted Answer

12 m

Question 3

Leo has 59 bricks each measuring 0.19 m long. He lines up the bricks to make a row. Find the actual length of the row of bricks.

Accepted Answer

11.21 m

Question 4

Susan colored in the decimal grid shown below. Write an expression that shows the area she colored. Then evaluate the expression.

Accepted Answer

0.3 X 0.8 
0.3 X 0.8 = 0.24

Question 5

Match each expression on the left with its product.

Accepted Answer

https://uploads.quizalize.com/418d86ca-ed3b-4053-ba31-a01011ee5b1d/question/1344cd98d38b44a39f0c1d4a144ce33666c4f77a.png

Question 6

Michelle bought 4.6 yards of fabric. Each yard of fabric cost $4.95. How much did Michelle spend on fabric? Enter your answer in the box

Accepted Answer

$22.77

Question 7

Choose all the expressions that are equal to 0.75 X 0.5.

Accepted Answer

https://uploads.quizalize.com/418d86ca-ed3b-4053-ba31-a01011ee5b1d/question/ae2516ed4764c6000eb241017761ad6b0c77ca68.png

Question 8

Select each equation that the number 10^2 makes true.

Accepted Answer

https://uploads.quizalize.com/418d86ca-ed3b-4053-ba31-a01011ee5b1d/question/4e361078602eceb846355894e5fee96ae5989d2e.png

Question 9

Nadia drew a square in her notebook. Each side measured 2.5 centimeters. What is the perimeter of Nadia’s square? Write an equation to model your work.

Accepted Answer

10 cm

Question 10

Nadia drew a square in her notebook. Each side measured 2.5 centimeters. What is the area of Nadia’s square? Write an equation to model your work

Accepted Answer

6.25 cm ^ 2

Question 11

Match each expression on the left with its product.

Accepted Answer

https://uploads.quizalize.com/418d86ca-ed3b-4053-ba31-a01011ee5b1d/question/bf3a44ead70da05962fe911b69f07697044ce503.png

Question 12

Select all the expressions that are equal to 0.09 X 0.4.

Accepted Answer

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Question 13

One glass of lemonade has 115 calories. How many calories are in 3.5 glasses of lemonade? Write an equation to model your work.

Accepted Answer

402.5 calories.

Question 14

Natalie likes to mail lots of postcards when she goes on vacation. In 2014, the cost of a postcard stamp was$0.34. Natalie buys 10 postcard stamps. What is the total cost of the stamps? Explain

Accepted Answer

$3.40. I moved the decimal point in 0.34 one place to the right.

Question 15

Natalie likes to mail lots of postcards when she goes on vacation. In 2014, the cost of a postcard stamp was$0.34. B. Natalie and her friends decide to buy 100 postcard stamps. What will be the total cost of the stamps? Explain

Accepted Answer

$34. I moved the decimal point in 0.34 two places to the right.

Question 16

Without doing the multiplication, match each expression on the left with the correct product. Use number sense to help you.

Accepted Answer

https://uploads.quizalize.com/418d86ca-ed3b-4053-ba31-a01011ee5b1d/question/1009f98281bc649c263493e1ef73dd17633338b0.png

Question 17

Derrick runs 2.25 miles each day. How many total miles will he have run after 10 days? Explain.

Accepted Answer

22.5 miles.  I moved the decimal point in 2.25, one place to the right.

Question 18

Select each equation that the decimal 0.65 makes true.

Accepted Answer

https://uploads.quizalize.com/418d86ca-ed3b-4053-ba31-a01011ee5b1d/question/2ac45c1794c8ca7b5925ad18a80e49e3feed7564.png

Question 19

Bradley walks 0.65 miles each Friday to his friend's house. He takes a different route home that is 1.2 miles. How many miles will Bradley walk to his friend’s house and back in a year? Show your work. Reminder: there are 52 weeks in a year.

Accepted Answer

96.20 miles

Question 20

Alyssa paints 3 walls blue. Each of the walls is 8.3 feet tall and 7.5 feet wide.  A) Round the length and width to the nearest whole number. Then estimate the area that Alyssa will paint. Write equations to model your work. B) Find the exact area. Write equations to model your work. C) Compare your estimate to the exact answer. Why is your answer reasonable?

Accepted Answer

A) 8.3 is about 8 and 7.5 is about 8. 8X8=64. 64 X 3 = 192 ft ^ 2                                                                                                               
 B) 8.3 X 7.5 = 62.25. 62.25 X 3 = 186.75 ft ^ 2   
 C) My answer is reasonable because 186.75 is close to 192

Question 21

Leticia and Jamal go to a bakery. Jamal wants to buy 6 muffins. How much will this cost? Write an equation to model your work.

Accepted Answer

$1.99 X 6 = $11.94

Question 22

Leticia and Jamal go to a bakery. Leticia wants to buy 12 bagels. She uses partial products to find her total. She says “$16.80 is close to my estimate of 12 X $1= $12, so this total is reasonable.”Do you agree with her? Explain your reasoning.

Accepted Answer

This total is not reasonable. $12 is an overestimate because she rounded $0.95 to $1. $12 X 1 = $12. Now, $12 X 0.95 should not give you an answer that is more than $12. The actual total is $11.40. $11.40 is more reasonable than $16.80. The person did partial products incorrectly.

Question 23

The area of one fabric square is 4.85 square inches. What is the area of a quilt made with 10^2 fabric squares? Explain.

Accepted Answer

4.85 X 10^2 = 485 inches ^2
I moved the decimal point in 4.85 two places to the right.

Question 24

Jen bought 3.72 pounds of apples at a farmer’s market. Andrea bought 4 times as much as Jen.

Accepted Answer

3.72 X 4

Answer

3.72 ÷ 4

Answer

3.72 X 1

Answer

3.72 ÷ 1

Question 25

Jen bought 3.72 pounds of apples at a farmer’s market. Andrea bought 4 times as much as Jen. How many pounds of apples did Andrea buy?

Accepted Answer

14.88 lb.

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