Associative Property
Problem Solving
Multiply by 9
Random Multiply!
100
(4x2) x 2
4 x (2x2)
4 x 4 = 16
100
You found 2 four-leaf clovers and 9 three-leaf clovers. What is the total number of leaves on the clovers you found?
35
(2 x 9) + (9 x 3)
100
9 x 4
Use a model
36
100
8x4
Use a model
32
200
3 x (3x3)
3 x 9 = 27
200
A turtle laid 5 eggs each minute for 10 minutes. What is the total number of eggs that 2 turtles will lay?
100
5 x 10 = 50
50x2= 100
200
9 x 6
Use a model
54
200
7x3
Use a model
21
300
(11x2) x 5
11 x (2x5)
11 x 10 = 110
300
A bakery sells cinnamon rolls for $2 each. A tray contains 2 rows of 4 rolls. You buy 2 trays. How many cinnamon rolls do you buy?
16 cinnamon rolls
300
what times 9 equals 81?
9
300
4x5
Use a model
20
400
2 x (8x4)
8 x (2x4)
8 x 8 = 64
400
You study spelling words for 5 minutes twice a day. How many minutes do you study spelling words in one week?
70
400
what times 9 equals 63
Use a model
7
400
6x4
Use a model
24
500
(5x2) x 3
5 x (2x3)
5x6=30
500
Six mockingbirds each build 4 nests during the winter season. A researcher predicts that each nest will have 2 eggs. Will there be enough eggs for a study that requires 50 eggs?
No.
6 birds x 4 nests x 2 eggs each
6 x (4x2)
6x8 = 48
500
Solve 9 times 4 using a number line
500
9x6
Use a model
54