Addition
0.95 + 5.09 =
6.04
13.8 / 3 =
4.6
For which 2 operations (addition, subtraction, multiplication, division) do you need to line up the decimal points?
Addition and Subtraction
62 - 48.6
13.4
45.6 / 3
15.2
For which operations (addition, subtraction, multiplication, division) do you need to count the number of digits after the decimal points?
Multiplication
9.6 + 0.18 =
9.78
43.03 - 6.91 =
36.12
2.3(5.7 - 3.67)
4.669
156 / 5 =
31.2
What number do you need to add to the dividend (after the decimal point) when there are no more numbers to bring down?
0
4.58 + 12.02 =
16.6
12 - 4.61 =
7.39
0.07 x 0.4
0.028
122 / 6.1
20
When multiplying by a decimal, which way do you move the decimal point?
To the left
8 + 2.45
10.45
A teacher buys 3.75 ounces of a compound for an experiment. The compound costs $5.12 per ounce. The teacher pays with a $20 bill. How much change will the teacher receive?
0.80
.23 x 6.7
1.541
0.583 / 0.11
5.3
A patio is rectangular. Its length is 6.7 meters, and its width is 4.1 meters. What is the approximate perimeter of the patio? Round your answer to the nearest whole number.
22 meters