Addition and Subtraction
0.95 + 5.09 =
6.04
141.5 x 10
1415.
8 x (6.5) =
52
221 divided by 1.3
170
For which 2 operations (addition, subtraction, multiplication, division) do you need to line up the decimal points?
Addition and Subtraction
73.92-15.7
58.22
Find the mean of the data set:
12, 3, 11, 18
11
4.2 x (1.8) =
7.56
33.6 / 5 =
6.72
For which operations (addition, subtraction, multiplication, division) do you need to count the numbers after the decimal points to determine where the decimal should go?
Multiplication
74.83 + 132.05
206.88
26.13 x 10^2
2613.
3.7 x 78.8 =
291.56
2.35 divided by 5
.47
What place value is the 4, in the decimal 122.342?
Hundredths
12 - 4.61
7.39
What number(s) are correctly multiplied by 10^4?
1) 76 x 10^4= 760
2) 891 x 10^4 = 8910000
3) 0.0008 x 10^4= 8
4) 0.23141 x10^4= 2314.1
2) 891 x 10^4 = 8910000
3) 0.0008 x 10^4= 8
4) 0.23141 x10^4= 2314.1
0.07 x 0.4
0.028
50.4/ 7.2
2
Which operation (addition, subtraction, multiplication or division) should you line up the numbers and not the decimals?
Multiplication
627.94 + 134.5544
762.4944
Find the mean of the data set:
8, 17, 11, 120
39
.293 x 6.7
1.9631
132.42/ 2.4
55.175
If your divisor has a decimal, what must you do to make the problem "long division friendly" (aka what must you do before you start dividing?)
In the divisor, you must move the decimal over until there is no decimal. And then move the decimal over the same amount of spots in the dividend.