5th topic 1

Exponents

100

2 x 10³

2,000

200

4 x 10² = _________________

400

300

10⁵ x 8 = _________________

800,000

400

Write 10 x 10 x 10 x 10 using exponents.

10⁴

500

Write this number in standard form (4 x 10⁵) + (3 x 10⁴ ) + (6 x 10² )

400000 + 30000 + 600

430,600

Decimals as Fractions

100

0.543   =

543/100

200

12/100

0.12

300

0.61 =

61/100

400

9/1000

0.009

500

0.025

25/1000

Expanded & Standard Form

100

9.3

(9x1) + (3 x 1/10)

200

(4 x 1,000) + (3 x 100) + (7 x 1) + (2 x 1/10)  + (8 x 1/1000)

4,000 + 300 + 7 + 0.2 +0.08

4,307.208

300

(9 x 100) + (6 x 10) + (5 x 1) + (3 x 1/10) + (2 x 1/100) + (7 x 1/1000)

900 + 60 + 5 + 0.3 + 0.02 + 0.007

965.327

400

2.36

(2x1) + (3 x 1/10) + (6 x 1/100)

500

45.789

(4 x 10) + (5 x 1) + (7 x 1/10) + (8 x 1/100) + (9x 1/1000)

Comparing Decimals

100

  8.7                     8.72

8.7 < 8.72

200

12.02                      12.2

12.02 < 12.2

300

3.75                     37.5

3.75 < 37.5

400

 987.17                987.045

987.17 > 987.045

500

  7.100                  7.1

7.100 = 7.1

Rounding

100

Round 9.789 to the nearest tenth

9.8

200

Round 102.867 to the nearest hundredth

102.87

300

Round 105.22 to the nearest whole number

105

400

Round 1,234.882 to the nearest tenth

1,234.9

500

Round 10,872.721 to the nearest whole number 

10,873