Mid Unit Review (Math Unit 2)

Place Value

100

50 = ____ X 10 

5

200

0.5 = ___ x 10

0.05

300

0.05 = ___ x 10

0.005

400

5 = ____ x 10

0.5

500

Draw a model to show 0.07 and 0.7

Which equation represents the relationship between the numbers?

a.   0.07 x 100 = 0.7

b.   0.7 / 10 = 0.07

c.   0.7 x 100 = 0.07

d.   0.07 / 10 = 0.7

d.   0.07 / 10 = 0.7

Powers of 10

100

What is 10,000 written as a power of 10 in exponent form?

10⁴

200

What power of 10 (exponent) completes the equation?

0.09 x ______ = 9

10²

300

What power of 10 (exponent) completes the equation?

______ x 0.5 = 500

10³

400

What power of 10 (exponent) completes the equation?

______ x 0.003 = 30

10⁴

500

Kevin told Marcus that when you multiply any number by 10³, you can just write three zeroes after the last digit of the number. He gives an example of 5 x 10³ = 5000 to help show that his rule is correct. Marcus disagrees and says that the product 0.5 x 10³ shows that Kevin's rule is not always true. 

Who is correct? Explain why. 

Marcus is correct because 0.5 x 10³ = 500. The place value shifted three times, but 500 only has two zeroes in it. 

Rounding

100

Round this number to the nearest tenth:

4.72

4.7

200

Round this number to the nearest tenth:

4.681

4.7

300

Round this number to the nearest hundredth:

5.678

5.68

400

Decide if each amount rounds to 7.6 (write yes or no next to each number)

a.     7.624

b.     7.528

c.     7.47

d.     7.614

a. 7.6 YES

b. 7.5 NO

c. 7.5 NO

d. 7.6 YES

500

Decide if each amount rounds to 14 (write yes or no next to each number)

a.     13.573

b.     14.502

c.     13.900

d.     14.075

a.     14 YES

b.     15 NO

c.     14 YES

d.     14 YES

Read and Write Decimals

100

Write four and twenty-seven hundredths as a decimal (standard form)

4.27

200

Write the number nineteen and two hundredths as a decimal (standard form)

19.02

300

Write 7.98 in expanded form

7 + 0.9 + 0.08

400

Write 21.56 in expanded form powers of 10.

2 x 10 + 1 x 1 + 5 x 0.1 + 6 x 0.01

500

Which expressions or numbers match 8.27

a.   eight and twenty-seven hundredths 

b.   8 + 0.27

c.   8 x 1 + 2 x 0.01 + 7 x 0.001

d.   0.08 + 2 + 0.007

e.   8 + 0.02 + 0.007

ONLY 

a.   eight and twenty-seven hundredths 

b.   8 + 0.27

Comparing

100

Compare. Write out the inequality. 

0.718 ____ 0.781

0.718  <   0.781

200

Compare. Write out the inequality. 

0.06  ____ 0.060

0.06  =   0.060

300

Compare. Write out the inequality. 

22.9  ____ 22.09

22.9 > 22.09

400

Compare. Write out the inequality. 

87.12 _____ 8.712

87.12  >  8.712

500

What number is the greatest? 

3.6, 3.794, 3.94, 3.29, 3.074

3.94