MATH RTI - Decimals

How do you say this decimal?

100

0.4

4 tenths 

200

0.78

78 hundredths 

300

.009

9 thousandths 

400

5.67

5 AND sixty-seven thousandths 

500

9.008

nine AND eight thousandths 

Put this expression into exponential form

100

10x10

10²

200

10

10¹

300

10x10x10x10

10⁴

400

10x10x10

10³

500

10x10x10x10x10

10⁵

What does this exponent mean?

100

10²

10x10

200

10³

1,000

300

10⁵

100,000

400

10⁶

1,000,000

500

10⁰

0

Multiplying decimals by powers of 10

100

1.2 x 10¹

12

200

3.78 x 10⁴

37,800

300

.54 x 10³

540

400

.675 x 10⁵

67,500

500

3.24 x 10²

324

dividing decimals by powers of 10

100

23.4 ÷ 10²

0.234

200

1.3 ÷ 10³

0.0013

300

0.8 ÷ 10³

.0008

400

12 ÷ 10⁴

0.0012

500

143 ÷ 10⁴

.0143