HHPS Math Club - Decimals!

Decimal Forms

100

3.5 in word form

Three ones and five tenths

200

6.28 in word form

six ones, two tenths, and eight hundredths

OR

six ones and twenty-eight hundredths

300

7.834 in expanded form

7 + 0.8 + 0.03 + 0.004

400

4 tenths + 6 hundredths + 2 thousandths in standard form

0.462

500

351 hundredths + 4 tenths in expanded form

3 + 0.9 + 0.01

> or <

100

2.58  ___ 2.6

2.58 < 2.6

200

2.387 ___ 2.382

2.387 > 2.382

300

6.341 ___ 2.349

6.341 > 2.349

400

4.718 ___ 4.72

4.718 < 4.72

500

5.68 ___ 5.521

5.68 > 5.521

Order of Operations

100

What is the acronym for the order of operations?

PEMDAS

200

What will you do first?

2² + 9 x 3 + (7 - 1) x 2

Parentheses 

(7 - 1)

300

2² + 9 x 3 + (7 - 1) x 2

43

400

14 + 72 x (1 ÷ 10) + 4 x (1 ÷ 10²)

21.24

500

0.3 x 10² + 0.002 x 10³

32

Rounding Decimals

100

Round 12.082 to the nearest tenth

12.1

200

Round 1.652 to the nearest tenth

1.7

300

Round 1.985 to the nearest tenth

2.0

400

Round each number to the tenth place, and then add the rounded numbers.

4.008

3.800

7.8

500

Round each number to the nearest tenth, and then add the rounded numbers.

7.502

2.623

10.1

Powers of 10

100

6.2 x 10¹

62

200

5.2 x 10³

5200

300

2.78 x 10³

2780

400

523 ÷ 10²

5.23

500

834,000 ÷ 10⁴

83.4