Gerico's Last Fraction Post
Adding and Subtracting Fractions
10/14 + 7/14 = 17/14 14 divided of 17 = 1 3/14
3 + 2/7
3 x 7 + 2 = 21 +2 = 23/7
8/12 - 5/12 =3/12 =1/2
Multiplying Fractions
3/4 x 2/6 = 6/24 = 1/4
Changed mixed fraction to an improper
multiply the numerators and denominators
8 1/2 x 11 1/3
8 x 2 + 1 = 17 3 x 11 +1 = 34
17 / 2 x 24/3 = 578/6
6 divided 578 = 93
Dividing Fractions
1/4 Divided 1/8 = 2
1/4 x 8/1 = 8/4 8/4 = 2
____________
1/8 x 8/1 = 1
2 divided 1/2 = 4
Word Problem
It takes 2 1/4 scoops of flour to make one cake.How many cakes do 15 scoops of flour make ?
15 divided 2 1/4
2 x 4 + 1 = 9 5 divided by 9 / 4
15 /1 x 4/9 = 6 2/3
_________________
4/9 x 9/4 = 1
1 - cakes do 15 scoops of flour make .
- Find the Common Denominator
- Add the numerator
10/14 + 7/14 = 17/14 14 divided of 17 = 1 3/14
3 + 2/7
3 x 7 + 2 = 21 +2 = 23/7
- Always the same denominator
- Subtract Numerator
8/12 - 5/12 =3/12 =1/2
Multiplying Fractions
- Multiply the numerators
- Multiply the denominator
3/4 x 2/6 = 6/24 = 1/4
Changed mixed fraction to an improper
multiply the numerators and denominators
8 1/2 x 11 1/3
8 x 2 + 1 = 17 3 x 11 +1 = 34
17 / 2 x 24/3 = 578/6
6 divided 578 = 93
Dividing Fractions
- Find the reciprocal
- Multiply the numerator to numerator
- Multiply the denominator to denominator
- Convert the fraction into a mixed fraction
- Simplify
1/4 Divided 1/8 = 2
1/4 x 8/1 = 8/4 8/4 = 2
____________
1/8 x 8/1 = 1
2 divided 1/2 = 4
Word Problem
It takes 2 1/4 scoops of flour to make one cake.How many cakes do 15 scoops of flour make ?
15 divided 2 1/4
2 x 4 + 1 = 9 5 divided by 9 / 4
15 /1 x 4/9 = 6 2/3
_________________
4/9 x 9/4 = 1
1 - cakes do 15 scoops of flour make .
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