Word Problem
Bill has 5 boxes. He wants to fill each box with 20 toys. How many toys does Bill have?
100 toys
0x3=0
Zero Property
Estimate the the product using front end-estimation
3 X 154
600
Use the model to find the value
_______ ####
_______ ####
28
Use front end-estimation
6 x 64
360
Franny has 9 cans of juice. Each can has 46 fluid ounces of juice. How many total fluid ounces does Franny have?
414
Name the property
3x6=18
6x3=18
Commutative Property
Use rounding to estimate the product
437 x 6=
2400
Use the place value model to make an equation
________ ###
________ ###
________ ###
________ ###
4 x 13
Which property is this?
0 x 1,999,345
Zero Property
Mr. Smith ordered 178 new text books for each grade at HVCS. There are 4 grades at his school. Use front end-estimation to figure out about how many text books he ordered all together.
400 textbooks
Name the property
Changing the grouping of the factors does not change the product.
Associative Property
Estimate the product of 6,325 x 8 using front end-estimation
48,000
Make a place value model for 5 x 10
______
______
______
______
______
Zoey says that every time she multiplies a 2 digit number by a 1 digit number she will need to regroup. Is she right?
No. There are times she won't have to regroup.
Sergio has 8 buttons. Chloe has 2 times as many buttons as Sergio. Derek has 3 times as many buttons as Chloe. How many buttons does Derek have?
48 buttons
Fill in the blank
4 x (2+6)
(__ X 2)+ (4 x __) =____
(4x2)+(4X6)=32
Find the estimated product using rounding
952 x 3
3,000
What would the equation be
_____ #######
_____ #######
_____ #######
_____ #######
4 x 16
Bubba uses 3 times as much water in his garden in August as he did in July. He used 27 gallons in August. How many gallons did he use in July?
Does 4 times as many as 5 have the same value as 5 times as many as 4?
Yes.
4x5=20
5x4=20
What is the Identity Property of Multiplication?
1 times any number
Mrs. Taylor wants to buy 4 clown fish for the class. They each cost $28.17. Should she use front end-estimation or rounding to find the estimated cost of the 4 fish.
Explain
Rounding. It is closer to finding the exact cost.
Estimating would not give her enough money.
4x$30=$120 Rounding
4x$20=$80 Estimating
Exact cost $112.68
Dan wants to share 12 pieces of candy with his 6 siblings. Draw a place value model to show how many pieces they will eat all together?
____ ## ____ ## ____##
____ ## ____ ## ____##
____##
12 x 7=54
Franky, Fritz, and Fabio are selling books. Franky sells 7 books. Fritz sells 5 times as many books and Franky. Fabio sells 3 times as many books as Fritz. How many books did Fabio sell?
105 books