+ and - fractions
1/4 + 2/4
3/4
1/2 (3/4)
3/8
4.6 + 2.3
6.9
3.2 x 4
12.8
When do you need a common denominator?
When adding or subtracting fractions
5/8 - 1/8
1/2
2/3 -: 1/6
4
12.75 - 4.8
7.95
2.45 xx 1.6
3.92
Which number tells you how the move the decimal when dividing decimals?
The number outside the house (the divisor)
1/2 + 1 /3
5/6
1 1/2 xx 2/5
3/5
6.407 + 2.86
9.267
8.64 -: 0.24
36
In which operation do you need to line up the decimals to solve?
When adding or subtracting decimals
3/4 - 1/6
7/12
3 1/3 -: 5/6
4
20 - 7.386
12.614
6.3 -: 0.9
7
What is the reciprocal of
5/8
8/5
Maya ran 2/3 mile on Monday and 5/8 mile on Tuesday. How much farther than 1 mile did she run in all?
2/3 + 5/8 = 31/24 = 1 7/24
A recipe uses 3/4 cup of flour per batch. How many batches can be made with 4 1/2 cups of flour?
4 1/2 -: 3/4 = 36/6 = 6
A shopper spends $12.85, $7.99, and $4.67 at the grocery store. How much change will they get from $30?
They spend $25.51, so they will get $4.49 back in change
A 12.6 meter ribbon is cut into pieces that are 0.35 meters long. How many pieces can be cut?
12.6 -: 0.35 = 36
When dividing fractions you need to....
Multiply by the reciprocal