Fraction Knowledge
What strategy do we have to use when we divide fractions?
Invert and Multiply
(1/2 + 1/3) × 2/5
1/3
2 1/2 + (3 1/4 - 1 7/8)
3 7/8
33 =
= 27
Chelsea has 9 problems to do for math homework. She has solved 2/3 of the problems already. How many of her math problems has she solved?
6 problems
How do we turn whole numbers into improper fractions?
Put a 1 under it.
4/5 + 1/2 - 1/3
29/30
2 1/10 ÷ 1 1/2 - 1 1/15
1/3
24 =
= 16
A cupcake recipe calls for 3/4 of a cup of butter. Rob wants to make 1/3 of the original recipe. How many cups of butter will Rob need?
1/4 cup
In word problems with fractions, the word "of" tells us we have to do what?
Multiply
5/16 - 11/10 ÷ 22/5
1/16
1 1/4 + 2 1/3 ÷ 1/6
15 1/4
1/9 × 5/8 + (1/2)3
7/36
A relay race covers 1 1/2 miles, and each runner on a team will run 1/4 of a mile. How many runners are needed for a team?
6 runners
What is the acronym for Order of Operations?
BEDMAS or PEMDAS
(2/3 - 1/4) + (1/2 × 1/3)
7/12
(1 1/2 + 2 3/4) - (4 1/2 - 3 3/4)
3 1/2
7/8 ÷ (2/3 - (1/3)2)
1 23/40
A recipe for 1 batch of cookies calls for ⅔ cups of raisins. Amy made 2½ batches of cookies. How many cups of raisins did she use in her recipe?
1 2/3 cups
What are the two major things we have to do when we divide mixed numbers?
1) Turn the mixed numbers into improper fractions.
2) Invert and Multiply
7/8 + 1/4 × (3/2 - 5/8)
1 3/32
(3/4)2 × 3/5 + 1/2
67/80
(5/6)2 ÷ (5/8 - 4/9)
3 11/13
Caeden rode his bike 2 1/4 miles on Tuesday. Lucas rode his bike 5/6 of what Caeden rode. How far did Lucas ride his bike?
1 7/8 miles