Multiplication Fractions
3/5 of a class of 45 are girls. Find the number of boys in the class.
3/5 x 45/1 = 135/5 = 27 girls
45 - 27 = 18 boys
Magic Phrase for Division of Fractions...
Keep, Change, Flip
A recipe called for 5/12 cup of chopped walnuts and 5/12 cup of diced walnuts. In total, how many cups of walnuts did the recipe call for?
10/12 or 5/6 cup
Sally has to walk 3 2/3 miles to get to the theater. Jess has to travel 1 5/8 miles to also get to the theater. How much further does Sally have to walk than Jess to get to the theater?
3 2/3 - 1 5/8
11/3 - 13/8
88/24 - 39/24
49/24
2 1/24
A recipe called for 1/2 cup of chopped tomatoes, 1/3 cup of diced tomatoes as well as 1/6 cup of minced tomatoes. In total, how many cups of tomatoes did the recipe call for?
1/2 + 1/3 + 1/6
3/6 + 2/6 + 1/6
6/6 = 1 whole cup
Mike had 3/4 of a chocolate bar. He ate 2/3 of it. How much part of the chocolate bar did he eat?
2/3 of 3/4 = 2/3 × 3/4
6/12 = 1/2
He ate 1/2 of the chocolate bar
1/3 ÷ 2/5
1/3 x 5/2
5/6
Sara planted 3/5 rows of beans and 5/6 rows of turnips in a garden. In total, how many rows of vegetables did Sara plant?
3/5 + 5/6
18/30 + 25/30
43/30
1 and 13/30
Mike has 2 1/10 week's worth of pay in a wallet and 2 1/2 week's of pay in the bank. How many more weeks of pay does Mike have stored in the bank?
2 1/2 - 2 1/10
5/2 - 21/10
25/10 - 21/10
4/10 = 2/5
Jess is 3 3/8 ft tall, whereas Mary is 1 1/6 ft tall. How much taller in feet is Jess than Mary?
3 3/8 - 1 1/6
27/8 - 7/6
81/24 - 28/24
53/24
2 5/24
3/4 × 15
3/4 x 15/1 = 45/4
11 and 1/4
If a spider can move 2/9 of a mile every hour, then how many hours would it take for a spider to go 8 miles?
8 divided by 2/9
8/1 x 9/2
72/2 = 36 hours
Sam picked 1/4 of a bucket of plums, and Fred picked 11/12 of a bucket of plums. How many buckets total did they pick?
1/4 + 11/12
3/12 + 11/12
14/12
1 2/12 or 1 1/6
Tim has 1 6/7 books left to read for school. Tim read 1 1/6 books on Friday. How many more books does Tim have to read?
1 6/7 - 1 1/6
13/7 - 7/6
78/42 - 49/42
29/42
Joan planted 2/3 rows of peppers with 5/8 rows of beans, as well as 1/12 rows of spinach in a garden. In total, how many rows of vegetables did Joan plant?
2/3 + 5/8 + 1/12
16/24 + 15/24 + 2/24
33/24
1 9/24 or 1 3/8
A recipe needs 1/4 tablespoon salt. How much salt does 8 such recipe need?
1/4 x 8/1 = 8/4 = 2 Tbsp.
Ron has 5 ¼ m long ribbon. She cuts it into three equal pieces. What is the length of each piece of ribbon?
5 1/4 divided by 3
5 1/4 divided by 3/1
21/4 x 1/3
21/12 = 1 9/12 or 1 and 3/4
) Mike did 4/9 of a load of laundry on Saturday and 4/6 of a load of laundry on Friday. What fraction of laundry did Mike do in total?
4/9 + 4/6
8/18 + 12/18
20/18 or 1 2/18
1 1/9
Mike picked 1 5/11 buckets of bananas, and Joan picked 2 5/6 buckets of bananas. How many more buckets did Joan pick?
2 5/6 - 1 5/11
17/6 -16/11
187/66 - 96/66
91/66 = 1 25/66
Mary spends 5 1/2 hours climbing and also spends
2 5/9 hours at the theater. How much less time does Mary spend at the theater compared to climbing?
5 1/2 - 2 5/9
11/2 - 23/9
99/18 - 46/18
53/18
2 17/18
Peter's truck gets him 10 2/3 miles per gallon. Suppose Peter's tank is empty and he puts 5 1/2 gallons, how far can Peter go with the truck?
32/3 x 11/2
352/6
58 4/6 = 58 2/3 miles
One teacher wants to give each student 3/8 of a slice of pizza. If the teacher has 9 slices of pizza, then how many students will she be able to hand out pizza to?
9 divided by 3/8
9/1 x 8/3
72/3 = 24
Melanie completed 3/10 of Tuesday's crossword and 3/7 of Sunday's crossword. In total, what fraction of these crosswords did Melanie finish?
3/10 + 3/7
21/70 + 30/70
51/70
Mike wants to complete 2 1/4 crosswords today. Mike has already done 1 5/7 crosswords. What fraction of crosswords does Mike have left to finish?
2 1/4 - 1 5/7
9/4 - 12/7
63/28 - 48/28
15/28
Joan completed 1/2 of Wednesday's crossword, 1/6 of Sunday's crossword and 3/7 of Monday's crossword. In total, what fraction of these crosswords did Joan finish?
1/2 + 1/6 + 3/7
21/42 + 7/42 + 18/42
46/42
1 4/42 or 1 2/21