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Estimating Products
Estimating Quotients
Partial Product
Open Array
Partial Quotient
100
Overestimate the product of 38 x 12
What is about 480?
100
Underestimate the quotient of 55 divided by 3
What is about 18?
100
Use partial product to solve 12 x 43
What is 516?
100
Use open array to solve 588 x 17
What is 9996
100
Use Partial Quotient to solve 5629 divided by 2
What is 2814 1/2
200
Underestimate the product of 23 x 45
What is about 900?
200
Overestimate the quotient of 148 divided by 5
What is about 30?
200
Use partial product to solve 63 x 98
What is 6,174?
200
Use open array to solve 215 x 34
What is 7310
200
Use Partial Quotient to solve 5382 divided by 4
What is 1345 2/4 or 1345 1/2
300
Overestimate and underestimate the product of 667 x 12.
What is overestimate about 8,400 and underestimate about 7,200?
300
Overestimate the quotient of 567 divided by 12
What is about 50?
300
Use partial product to solve 125 x 9
What is 1,125?
300
Use open array to solve 784 x 56
What is 43,904
300
Use Partial Quotient to solve 7446 divided by 8
What is 930 6/8 or 930 3/4
400
Overestimate 5543 x 123
What is 550,000?
400
Underestimate the quotient of 1,234 divided by 8
What is about 150?
400
Use Partial product to solve 582 x 16
What is 9,312?
400
Use open array to solve 198 x 77
What is 15,246
400
A restaurant needs to buy 373 new plates. If each box has 97 plates in it, how many boxes will they need to buy?
What is 3 82/373
500
Underestimate the product of 4,235 x 167
What is 600,000?
500
Overestimate and underestimate the quotient of 5,678 divided by 5
What is overestimate about 1200 and underestimate about 1,000?
500
Use partial product to solve 487 x 13
What is 6,331?
500
Use open array to solve 4561 x 12
What is 54,732
500
A cafeteria was putting milk cartons into crates. They had 143 cartons and were putting them into crates with 42 cartons in each crate. How many full crates would they end up with?
What is 3