Multiplication
60 x 70
4,200
What is the best estimate for the value of 691 x 4?
A. 1,000
B. 30,000
C. 3,000
D. 2,000
C. 3,000
90 + 90 + 72 + 16
268
Tyler walked into the cafeteria on the first day of high school and saw that there were 64 rows of chairs set up. Each row of chairs had 87 chairs in it. How many chairs were there all together?
A. 4,193
B. 5,568
C. 5,578
D. 6,568
B. 5,568
83 x 46
3,818
What is the best estimate for the value of 3,595 x 6?
A. 2,400
B. 9,000
C. 4,000
D. 3,000
A. 2,400
500 + 400 + 60 + 14
974
Ivory noticed that there were 31 rows of soccer balls out on the field as she walked up to practice. Each row had 15 soccer balls. How many soccer balls were there all together?
A. 928
B. 513
C. 465
D. 800
C. 465
7 x 546
3,822
Which is the best estimate for the value of 7,495 x 8?
A. 1,000
B. 6,000
C. 60,000
D. 600,000
C. 60,000
1,200 + 300 + 60 + 20
1,580
Find the value of 15 x 43. Show your reasoning.
A. 645
B. 465
C. 655
D. 285
A. 645
4 x 2,530
10,120
Which is the best estimate for the value of 13,010 x 45?
A. 580,000
B. 630,000
C. 1,000,000
D. 500,000
A. 580,000
21,000 + 350 + 120 + 30
21,500
The librarian is rearranging books to prepare for the next school year. She places books on 14 shelves in the library. Each shelf holds 42 books, and every shelf is filled the same way. How many books are on the shelves altogether? Show your thinking?
A. 7,506 books
B. 785 books
C. 656 books
D. 756 books
D. 756 books
58 x 7,913
458,954
Which is the best estimate for the value of 6,190 x 3?
A. 20,000
B. 34,000
C. 18,600
D. 15,000
C. 18,600
32,000 + 800 + 560 + 32
33,392
Han is looking at an array, what are the three ways that he can use the array to find the product?
A. Han can find the sum by multiplying sum of the dots in the rows and the sum of dots in the column.
B. Han could find the sum of all the columns of dots to find the total.
C. Han could find the difference in the number of rows and columns to find the total number of dots.
D. Han must count all the dots to find the total.
E. Han could find the number of dots in half the array and then double it to find the total.
A. Han can find the sum by multiplying sum of the dots in the rows and the sum of dots in the column.
B. Han could find the sum of all the columns of dots to find the total.
E. Han could find the number of dots in half the array and then double it to find the total.