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Miss Clarke's Rounding Decimals Review

Total questions: 12

Worksheet time: 22mins

Name
Class
Date
1.

here are two grids. One the left, how units would you shade to represent 0.5? How many units would you shade on the right to represent 0.05?

a)

left:0. 5 = lines (tens) right: 0.05 = 5 cubes (5 ones)

b)

left = 0.5 = 5 cubes (ones) right: 5 lines (tens)

c)

5 lines (tens) for both

2.

Select true or false:

Four and nine hundred two thousands is equivalent to 4.903

a)

True

b)

False

3.

Select true or false:

0.9 + 0.003 + 4 is equivalent to 4.903

a)

True

b)

False

4.

Select true or false:

4 x 1 x 9 x 1/10 + 3 x 1/1000 is equivalent to 4.903

a)

True

b)

False

5.

Julian told his friend Radley that when you multiply a number by 10 to the power of 3, you can just write 3 zeros after the last digit of the number. Radley disagrees and gives his example: 0.4 x 10 to the power of 3. Who is correct?

a)

Radley-0.4 x 10 to the power of 3 is just 4!

b)

Julian-you add 3 zeros--0.4 x 10 to the power of 3 is actually 400

6.

In which number does the digit 6 have a great value, 0.603 or 0.458? How many times greater is the value? Explain how you know.

4 lines
7.

Which of these changes would make this comparison true? Select all correct answers. 5.6 < 5.47

a)

Round 5.45 to the nearest tenth

b)

increase the tenths digit in 5.47 to a 6

c)

Change the 6 in 5.6 to a 4

d)

Reverse the tenths and hundredths digits in 5.47

e)

Increase the tenths digit in 5.6 to a 7 and change the symbol to >

8.

Blocks of cheese are cut at the deli and weights are show in the table below. Round each block of cheese to the nearest hundredths of a pound. Explain how you rounded

4 lines
9.

Five newborn babies at a hospital weighed the following weights in pounds. Which weight(s) round to 8 lbs? Check all the correct answers.

a)

8.075

b)

7.099

c)

7.561

d)

8.501

e)

7.800

10.

Which equations are true? Select all the correct answers.

a)

 0.06 × 102 = 60.06\ \times\ 10^2\ =\ 6  

b)

 102 × 0.3 = 30010^2\ \times\ 0.3\ =\ 300  

c)

 0.50 × 102 = 500.50\ \times\ 10^{2\ }=\ 50  

d)

10 to the power of 4 x 0.004  = 40

11.

A jeweler weighs some pieces of gold before making them into rings. she write the following weights measured in ounces. Put the following weights from heaviest to lightest:

4.7, 4.898, 4.98, 4.39, 4.071

4 lines
12.

Penelope needs to write the number thirteen and thirty-one hundredths as a decimal on her science lab report. How should she write this in standard form?

a)

13/031

b)

13.13

c)

13.31

d)

13.013