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Cathy works at a restaurant. On Monday, she served 9 tables with 6 people at each table.
On Tuesday, she served 86 people. She wants to know how many more people she served on Tuesday than on Monday.
Select the correct operations to represent this problem using equations.
9 _____ 6 = m
86 ______ 54 = d
9 x 6 = 54 people on Monday
86 - 54 = 32 more people on Tuesday
20 people each bring 3 food dishes to an awards banquet. The dishes are shared equally by 180 people at the banquet.
Part A: How many people share 1 food dish?
Part B
Chelsie thinks that the answer is 9. She says,
"20 + 3 = 23, and 23 rounds to 20. Then 20 × 9 = 180."
Do you agree with her reasoning? Explain why or why not.
Part A: 20 x 3 = 60 dishes
180 / 60 = 3 people
Part B
No, Chelsie should have multiplied 20 times 3 instead of adding since 20 people each brought 3 dishes of food.
Roger has 120 peanuts. He saves 48 for himself. He divides the rest equally among 8 friends.
He wants to find how many peanuts each friend gets.
Which equations should he use? Choose all that apply. Then Solve.
120 - 48 = 72 peanuts to share
72 / 8 = 9 peanuts
E A ; 9 peanuts
Katya collects badges from the National Parks Junior Rangers program.
She wants to know how many cases she needs to display her collection. She can fit 8 badges in one case.
There are 207 National Parks that participate in the Junior Ranger badge program.
She does not have the badges for 165 parks. Which equation should she use first to solve this problem?
A
Marcello sells coupon books to his neighbors. 4 neighbors each buy 2 coupon books.
There are 8 coupons in each book.
What is the total number of coupons that all of his neighbors will get?
4 x 2 = 8 coupon books bought
8 coupons x 8 books = 64
64 coupons
Mrs. Zalesky lives 6 miles from her office. She drives to her office and back 5 days each week.
On Sunday, she also drives 127 miles to visit her sister. How many miles does Mrs. Zalesky drive each week?
10 x 6 = 60 miles for 5 days a week
60 + 127 = 187 miles each week
187 miles each week
A diner has 645 napkins. 325 napkins are used at lunch. 113 napkins are used at dinner.
Melanie says that 325 – 113 = n napkins are used in all, and that 645 – 212 = r napkins are left.
Is her answer reasonable? Explain why or why not.
No, because Melanie subtracted the number of napkins used at dinner from the number of napkins used at lunch. She should have added those together then subtracted that number from 645.
Amy counts butterflies for a science project.
She wants to know how many more butterflies she saw this month than in the past 4 months.
First she adds the number of butterflies she saw in the past 4 months.
She calls this number b. What should Amy do next?
A. Subtract b from the number of butterflies she saw this month.
B. Add b to the number of butterflies she saw this month.
C. Multiply b by 4.
D. Multiply b by the number of butterflies she saw this month.
A, Subtract b from the number of butterflies she saw this month.
Penny has 139 postcards in her collection. Abe has 48 postcards in his collection.
Then, Abe gives his collection away. He divides it equally among Penny and 7 other friends.
How many postcards does Penny have now?
48 / 8 = 6
6 + 139 = 145
145 postcards
Choose Yes or No to tell if the estimate is reasonable for the solution of this problem: k = 7 × 9; 481 – k.
A) 60 Yes or No
B) 400 Yes or No
C) 420 Yes or No
D) 475 Yes or No
A) No
B) Yes
C) Yes
D) No