Dividing Fractions
1/3 divide 2/3
1/2
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
4/5 divide 4/5
1
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
2/3 divide 4/7
1 1/7
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
2 2/3 divide 5 1/2
16/33
20 - 9.41
10.59
0.32 x 0.2
0.064
4.4/0.4
11
When multiplying by a decimal, how do you know where to place the decimal?
Count the number of digits behind the decimal in both numbers
4 2/5 divide 1 2/3
2 16/25
100 - (40 + 5.49 + 10.99)
43.52
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.