Powers of 10
Comparing Decimals
Adding Decimals
Multiplying Decimals
Subtracting Decimals.
Dividing Decimals
Challenge
100
6.78 / 102
0.0678
100
Compare these decimals, which one is larger?
0.2 _____ 0.23
0.23
100
Add these decimals. 21.74 + 8.27
30.01
100
Multiply these decimals. 24.2 x 0.14
24.2 x 0.14 = 3.388
100
Subtract these decimals.
35 - 2.75
35 - 2.75 = 32.25
100
1.5 divided by 3
0.5
100
148 - 49.5
148 - 49.5 = 98.5
98.5
200
12 x 103
12,000
200
Compare these decimals, which one is larger?
0.902 _____ 0.920
0.920
200
Add these decimals.
17 + 9.54
26.54
200
Multiply these decimals. 0.7 x 2.6
1.82
200
Subtract these decimals.
2.15 - 1.36
2.15 - 1.36 = 0.79
0.79
200
12.84 divided by 12
1.07
200
Chelsey is playing a video game. She gets 15 points for every target she hits. How many targets must Chelsey hit to score 3375 points.
3375 / 15 = 225
225 targets
300
74 / 102
0.74
300
Compare these decimals, which one is larger?
0.202 _____ 0.2023
0.2023
300
Add these decimals. 6.125 + 18
24.125
300
Multiply these decimals.
0.23 x 7.5
1.725
300
Subtract these decimals.
10.71 - 0.7
10.01
300
300
Ms. Goebel is taking her class to the movies. She will need to buy tickets for 12 students and 2 teachers. How much will it cost?
Step 1: 7.95 x 12 = 95.40
Step 2: 95.40 + 21.90 = $117.30
$117.30
400
4.78 x 10
47.8
400
Compare these decimals with <, >, or =
0.73 _____ 0.730
=
400
Add these decimals. 4.67 + 29.1
33.77
400
Multiply these decimals. 2.5 x 3.04
7.6
400
Subtract these decimals.
1.72 - 0.8
0.92
400
Find the quotient of 1.012 divided by 4
0.253
400
Find the mistake. 
The decimal is in the wrong place. The answer should have 2 decimals places. The correct answer is 34.32.
500
81.47 / 10
8.147
500
Compare these decimals, which one is larger?
0.5003 ____ 0.503
0.503
500
Add these decimals.
5.2 + 3.11
8.31
500
Multiply these decimals. 4.04 x 5.3
21.412
500
Subtract these decimals.
2.54 - 1.82
0.72
500
Divide 7.14 by 7
1.02
500
Chelsea has 6 cups of chocolate. She needs 2.5 cups to make her brownies. How many cups will she have left?
3.5 cups
600
2.34 x 100
234
600
Put the following decimal numbers in order from least to greatest.
0.6121 , 0.6021 , 600
0.6021 , 0.6121 , 600
600
4 + 0.33 + 28.5 + 0.7 =
33.53
600
9.3 X 37=
344.1
600
2.5-0.671=
1.829
600
1.316 divided by 2 =
0.658
600
68.25 ÷ 3.5
68.25 ÷ 3.5 = 19.5
19.5