Rules
When adding/subtracting fractions, do you need common denominators?
Yes
Add 1/2 + 1/4
3/4
Add the decimals: 1.46 + 1.21
2.67
Subtract the fractions 6/12 - 4/12 in simplest form
1/6
10.8 divided by 2.4
4.5
When multiplying decimals, do the decimal points need to line up?
no.
Add 1/2 + 3/4
1 1/4
Add the decimals: 1.5 + 2.03 + 0.6
4.13
5/6 divided by 5/8
1 1/3
9 divided by 0.6
15
When dividing decimals, which number needs to be a whole number?
5 2/5 x 9/5
9 18/25
Subtract 4.52 - 2.001
2.519
2 3/5 + 3 1/2
6 1/10
41.67 + 21.1
62.77
When adding/subtracting fractions, do we need to convert mixed numbers to improper fractions?
No, but it is an option.
2/3 x 19/10
1 4/15
25.51 x 17
433.67
3 6/9 x 3/4
2 3/4
0.7 divided by 2.8
0.25
When multiplying and dividing mixed numbers, do the mixed numbers need to be converted into improper fractions?
Yes
Add 1/3 + 2/6 + 3/5
1 4/15
21.2 x 2.3
48.76
5 1/2 x 7 3/4
42 5/8
9.07 divided by 0.2
45.35