Addition
*Double*
5.68 - 4.23 =
1.45
*Double*
11.27 + 9.4 =
20.67
For which 2 operations (addition, subtraction, multiplication, division) do you need to line up the decimal points?
Addition and Subtraction
9.6 + 0.18 =
9.78
43.03 - 6.91 =
36.12
*Double*
3.7 x 0.8 =
2.96
For which operations (addition, subtraction, multiplication, division) do you need to count the number of digits after the decimal points?
Multiplication
*Double*
1.23 + 8
9.23
*Double*
12 - 4.61 =
7.39
0.07 x 0.4
0.028
When multiplying by a decimal, which way do you move the decimal point?
To the left
8 + 2.45
10.45
62 - 48.6
13.4
*Double*
0.23 x 6.7
1.541
When multiplying by a 100, how many places and which way do you move the decimal point?
Right two