Add/Subtract
3.5 + 2
5.5
0.5 x 4
2
3.6/3
1.2
For which 2 operations (addition, subtraction, multiplication, division) do you need to line up the decimal points?
Addition and Subtraction
8.1 - 6.3
1.8
0.8 x 0.7
0.56
4.24/2
2.12
For which operations (addition, subtraction, multiplication, division) do you need to count the number of digits after the decimal points?
Multiplication
5 + 0.6 + 26.08
31.68
35 x 0.3
10.5
53.5/5
10.7
What digit do you need to add to the dividend (after the decimal point) when there are no more numbers to bring down?
0
20 - 9.41
10.59
0.32 x 0.2
0.064
4.4/0.4
11
When multiplying by a decimal, which way do you move the decimal point when placing it in your answer?
To the left
89 - 23.543
65.457
1.2 x 5.5
6.6
64/.02
3,200
What's the rule when you have a decimal in a divisor?
Make the divisor a whole number.