Topic 1 Decimals

Powers of 10

100

10³=

1,000

200

10⁶=

1,000,000

300

4 x 10³ =

4,000

400

52 x 10⁴ =

520,000

500

If Jane scored 5 x 10² points and Alex scored 8 x 10¹ points.  How many more points did Jane score than Alex?

420 points

Converting Decimals

100

Write 0.5 as a fraction.

5/10

200

Write 0.08 as a fraction.

8/100

300

Write 0.017 as a fraction.

17/1,000

400

Write 9/100 as a decimal.

0.09

500

Write 657/1,000 as a decimal.

0.657

Place Value

100

4.56 Which digit is in the tenths place?

5

200

0.607 Which digit is in the thousandths place?

7

300

Four and forty three thousandths written as a decimal is:

4.043

400

Twenty three hundredths as a decimal is:

0.23

500

James wrote the number "two hundred and fifty two hundredths" as 252.  Is he correct?  If not, what is the correct decimal form?

No, 200.52

Ordering and Comparing

100

Compare using >, <, or = 

0.567 and 0.576

<

200

Compare using >, <, or =

0.24 and 0.240

=

300

Compare using >, <, or =

9.999 and 9.99

>

400

Put in order from least to greatest:

0.543, 0.567, 0.6, 0.5

0.5, 0.543, 0.567, 0.6

500

Put in order from greatest to least:

8.8, 8.78, 8.782, 8.09, 8.9

8.9, 8.8, 8.782, 8.78, 8.09

Rounding

100

Round 7.8 to the nearest whole number.

8

200

Round 9.067 to the nearest tenths place.

9.1

300

Andrew says 10.87 rounded to the nearest whole number is 10.  Is he correct?  If not, what is the correct answer?

No, 11

400

Round 139.897 to the nearest hundredths place.

139.90

500

Annie is at the store and sees boxes of cereal for $4.65, $4.75, $4.45, and $4.15.  Her mom wants her to only spend $4.50 if possible.  Which cereal box is closest in price to $4.50?

$4.45