Decimal Review

Powers of ten

100

Make 87.9 ten times bigger

879

200

Make 67.27 ten times bigger

672.7

300

Make 82.13 ten times smaller

8.213

400

Make 7.08 ten times smaller

.708

500

Make 10.04 one hundred times bigger. 

1,004

Does the zero matter?!?!

100

0.6

No!

200

.06

Yes! It is a placeholder.

300

704

Yes it is a placeholder!

400

8.30

No! It does not change the value of the number. 8 and 3/10 is the same thing as 8 3/100

500

540.35

Yes! It is a placeholder. 

Which is bigger?

100

7.09 or 7.90?

7.90

200

.25 or .244?

.25

300

.326 or .327?

.327

400

Which is bigger, 48.23 or 48.09?

48.23

500

1.009 or 1.010?

1.010

Expanded form

100

Write this number in standard form: (8x10) + (4x1) + (5 x 1/10) + (3 x 1/100)

84.53

200

Please write in expanded form: 78.23

(7 x 10) + (8 x 1) + (2 x 1/10) + (3 x1/100)

300

Please write in expanded form: 93.6

(9 x 10) + (3 x 1) + (6 x 1/10)

400

Please write in standard form: (4 x 100) + (3 x 10) + (8 x 1) + (7 x 1/100) 

438.07

500

Please write in expanded form: 25.006

(2 x10) + (5x1) + (6 X 1/1,000)

Random

100

Nayeli has $5.50. Luwina has $55.00. How many times more money does Luwina have than Nayeli?

Ten times more

200

Add these: 3.21 + 1.36

4.57

300

Make this number 100 times smaller: 89.6

.896

400

Put the numbers in order from greatest to least:

.34            .05               .29

.34          .29             .05

500

Put the numbers in order from greatest to least:

0.021   0.213    0.168          0.995

0.995    0.213  0.168   0.021