Estimating Products
2 digit or 3 digit Multiplication
Multiples of 10, 100, and 1,000
3 digit Factors and Inequalities
Story Problems
100
When estimating to find a product, which is the best way to estimate? Rounding or Front end Estimation
What is rounding.
100
Identify the factors and the product in the following multiplication problem: 50 x 5= 250
What is 50 and 5 are the factors. 250 is the product.
100
Multiply 4 x 200.
What is 800.
100
Multiply 3 x 200 x 4
What is 2,400.
100
Maggie opens 4 boxes up that contain 4 pictures each. How many pictures did she find?
What is 16 pictures.
200
Estimate the product: 3 x 42
What is 120
200
Multiply 92 x 3.
What is 276.
200
Explain how to multiply with multiples of 10, 100, and 1,000. Example: 30 x 70
What is multiply your basic fact, then bring over the zeros.
200
Explain why 3 x 30 and 30 x 3 will give you the same product.
What is the communitive property of multiplication lets you multiply factors in any order and you will get the same answer.
200
Jaiah collected hats for the homeless. He put 25 hats in 3 boxes. How many hats did he collect?
What is 75 hats.
300
Estimate the product for: 55 x 3
What is 180.
300
Multiply 727 x 5.
What is 3,635.
300
Multiply 800 x 70
What is 5,600.
300
Whic of these inequalities is not true? a) 2 x 34 < 7 x 9 b) 3 x 25 > 9 x 8 c) 11 x 9 > 44 x1
What is A.
300
A jungle gym cost $567. Estimate the cost of 8 jungle gyms.
What is $4,800.
400
The 4th grade is planning to go to St. Mary's City. There are 3 fourth grade classes with 26 students in each class. About how many students are going on the trip?
What is 90 students. 30 x 3=90
400
Multiply 999 x 9.
What is 8,991.
400
Which is greater? 500 x 6 or 50 x 60?
What is neither. They both equal 3,000.
400
Which expression is equivalent to 5 x 15? a) 2 x 35 b) 3 x 25 c) 4 x 20
What is B.
400
Look at the pictograph. Estimate the cost of 6 hamsters.
What is $120.
500
A capuchin monkey costs $18. Estimate the cost of 12 capuchin monkeys.
What is $240. $20 x 12= $240
500
Multiply 8 x 756. Explain in a step by step manner how you solved your problem.
What is 6,048. Model explanation: First I multiplied my ones and regrouped. Then I multiplied my tens and added in the extra tens, then I regrouped. Finally, I multiplied my hundreds and added in the extra hundreds. 8 x 756= 6,048.
500
Which inequality is NOT true? a) 300 x 30 > 20 x 200 b) 80 x 90 < 8 x 900 c) 5 x 60 > 4 x 30
What is B. 80 x 90 is equal to 8 x 900.
500
Which of the following factors could fill in the blank and make the expression true? ____ x 700 > 4,200 a) 4 b) 6 c) 7
What is C. 7 x 700 equals 4,900, which is greater than 4,200.
500
Answer the BCR given to you.
Ms. Polatty will check!
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