Decimal Jeopardy

Adding Decimals

100

0.5 + 0.9

1.4

200

4.8 + 1.9

6.7

300

27.4 + 39.6

67

400

3.45 + 128

131.45

500

12.89 + 347.2

350.09

Subtracting Decimals

100

1.2 - 0.5

0.7

200

5.2 - 2.3

2.9

300

15.4 - 1.05

14.35

400

23 - 3.15

19.85

500

103.4 - 6.25

97.15

Multiplying Decimals

100

5.7 X 0.1

0.57

200

43 X 0.01

0.43

300

4.5 X 1.5

6.75

400

10.5 X 2.18

22.89

500

125 X 0.45

56.25

Dividing Decimals

100

5.7 / 0.1

57

200

3 / 0.01

300

300

8 / 0.4

80/4 or 20

400

0.9 / 3

3/10 or 0.3

500

1.6 / 2.4

160/240 or 2/3

Mr. Hastings Needs Help

100

HELP! Which digit is in the hundredths place???

258.943

Oh! Right, the 4 is in the hundredths place!

258.943

200

Help! Ms. Morgan says I did something wrong but I don't know how. What mistake did I make? 

OH! I forgot my place-holder zero!

300

Help! Mrs. Morency thinks 54 x 0.01 = 5,400! What was her mistake?

Oh! She multiplied by 100 instead of 1/100! It's 0.54

400

Help! Daniel can't figure out what goes in the blank!

98.1 X ___ = 9.81

What goes in the blank?

Oh, right! Daniel should put in 0.1

500

Josh said that 7.5 X 6 is the same as (8 X 6) - (0.5 X 6). Is he right or wrong? Why?

OH! He is correct!

7.5 X 6 = 45

8 X 6 = 48

0.5 X 6 = 3

48 - 3 = 45