Estimation
How can we estimate this product? - 13 x 24
10 x 20= 200
37 x 42
1554
23 × 30
690
The product of two factors is 1,200. One of the factors is 20. What is the other factor?
60
A bakery has 12 bins of bagels. Each bin is filled with 37 bagels. Find the total number of bagels. Use rounding to check if your answer is reasonable. Show your work.
444
How can we estimate this product? -34 x 52
30 x 50 = 1500
10 x 10
100
16 x 13
208
The product of two factors is 3,000. One of the factors is 60. What is the other factor?
50
A school library has 15 shelves of books. Each shelf holds 28 books.
Find the total number of books in the library.
Use rounding to check if your answer is reasonable.
Show your work.
420 books
How can we estimate this product? - 12 x 37
10 x 40= 400
27 x 14
378
20 x 64
1,280
The product of two factors is 2,400. One of the factors is 30. What is the other factor?
80
A farmer has 18 crates of apples. Each crate contains 46 apples.
Find the total number of apples the farmer has.
Use rounding to check if your answer is reasonable.
Show your work.
828
Mr. Luca bought 28 notebooks. Each notebook has 54 pages. What is a good way to estimate the total number of pages Mr. Luca bought?
30 x 50
56 x 39
2,184
94 x 69
6,468
The product of two factors is 5400. One of the factors is 90. What is the other factor?
60
Marla wants to buy a new tablet that costs $565, including tax. She saved $15 per week for 30 weeks. Does Marla have enough money saved to buy the tablet? Show your work. Write at least 1 complete sentence to explain whether or not Marla has enough money and how you know.
15 x 30= 450, not enough money
Nika needs to make 37 beaded necklaces. She puts 42 beads in each necklace. Which is the best way to use rounding to estimate the number of beads Nika needs?
40 x 40
83 x 75
6,225
98 x 73
7,154
The product of two factors is 7,200. One of the factors is 90. What is the other factor?
80
The lawn service charges $85 to mow, weed, and fertilize a lawn. How much did the lawn service earn if 15 lawns were tended in June and 23 lawns were tended in July? Write and solve equations to answer the question. Show your work. Answer the question in a complete sentence.
85 x 15 = 1,275
85 x 23= 1,955
1, 275+ 1,955 = 3,230