Addition
0.95 + 5.09 =
6.04
5.68 - 4.23 =
1.45
8 x 6.5 =
52
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
11.27 + 9.4 =
20.67
67.75 - 8.1 =
59.65
What is the area of a rectangle with a length of 4.2 inches and a width of 1.8 inches?
7.56 inches2
33.6 / 5 =
6.72
For which operation (addition, subtraction, multiplication, division) do you need to count the number of digits after the decimal points?
Multiplication
What is the perimeter of a rectangle with a width of 12.4 inches and a length of 9.1 inches?
43 inches
43.03 - 6.91 =
36.12
3.7 x 0.8 =
2.96
156 / 5 =
31.2
What do you need to do to the dividend (after the decimal point) when there are no more numbers to bring down but there is a remainder?
Annex a zero
1.23 + 8.725
9.955
16 - 3.67
12.33
0.07 x 0.4
0.028
What is the width of a rectangle with an area of 122 cm2 and a length of 6.1 cm?
20 cm
When multiplying by a decimal, which way do you move the decimal point when placing it in your answer?
To the left
83 + 2.45 + 14.024
99.474
79.01 - 42.5
36.51
0.98 x 7.4
7.252
118.56 / 3.9
30.4
What's the rule when you have a decimal in a divisor?
Make the divisor a whole number by moving the decimal to the right. Then, move the decimal to the right the same number of place values in the dividend.