Multiplication
What is 9 x 4?
36
A: 8 x 25
B: 2 x 4 x 25
Which strategy was used from A to B? Explain.
4 is a friendly factor of 25, so breaking up the 8 into 2 x 4 will make it easier to get rid of the 25.
1,756
Round to the nearest ten.
1,760
The _____________ states that multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products.
Fill in the blank.
Distributive Property
24 = 6 x 4
____ is ____ times as many as ____.
24 is 6 time as many as 4.
What is 700 x 2?
1,400
A: 4 x 12 x 9
B: 12 x 4 x 9
Which property was used from A to B? Explain.
Commutative property.
Rearranges the order the factors are in.
7,392
Round to the nearest thousand.
7,000
There are 5 times as many of cookies than brownies at the bake sale. If the total number of cookies and brownies is 42, how many cookies are there?
Draw a model.
7 x 6 = 42.
___ times as many as ____ is ____.
7 times as many as 6 is 42.
What is 603 x 5?
Use the distributive property with addition to solve.
(Draw a diagram if you need)
3,015
8 x (298)
Which strategy would you use with this problem? Explain.
Subtratction.
298 is very close to 300 which would create a basic fact for us to solve and make it easier to solve.
682 x 3
Round to the nearest hundred.
2,100
Planters at the flower shop are planting seeds in 14-row seed trays. They plant 7 seeds in each row. How many flowers will there be in each tray if they all grow?
98 flowers
What is 800 x 7?
Explain how to solve this using mental math.
5,600.
Cover up the zeros, multiply the basic fact, add the amount of zeros that were covered.
What is 74 x 8?
Solve using partial products.
What are the partial products in this problem?
592
560 and 32
A: (12 x 4) x 25
B: 12 x (4 x 25)
Which property was used from A to B? Describe.
Associative property.
Changes the order of the first numbers being multiplied.
5,825 x 7
Round to the nearest thousand.
42,000
There are 9 rows of 16 seats at the movie theater. In the middle of those seats, there are 4 rows of 8 seats that have cup holders. How many seats do NOT have cup holders at the movie theater?
112 seats
What are the rules for the orders of operation?
First, multiply and divide from left to right.
Then, add and subtract from left to right.
What is 1,482 x 4?
Solve using regrouping.
5,928
A: 16 x 50
B: 2 x (8 x 50)
Which strategy was used from A to B? Explain.
Halving and doubling.
Cut one factor in half and multiplied it, then multiplied the product by two to double it.
10,489 x 8
Round to the nearest thousand.
80,000
Jacob buys 4 packs of gum with 12 pieces in each. He also buys 3 packs with 15 pieces in each. Jacob chewed 37 pieces. How many pieces of gum does he have left?
56 pieces of gum
63 is 9 times as many as 7.
How would I write this as an equation?
63 = 9 x 7.