Array Model
88
(2 x 2) x 2
8 units cubed
2 x _ = 4 x 10
20
Write an expression to solve 8 x 7 using the double double double strategy
2 x 2 x 2 x 7
Ms. Longanecker needs to by 50 dounts for her students. If 10 donuts cost 12 dollars how much will she spend on 50 dounts?
12 x 5 =
60 dollars
12 x 15
180
(3 x 4) x 5
60 cubic units
12 x _ = 6 x 24
12
Write an expression: to solve 5 x 17 Mr. Kitay first does 10 x 17 then divides by 2
(10 x 17) / 2
Ms. Archer needs to find the area of her rectangular basement so she can buy the right amount of carpet. If her basement is 11 feet in length and 12 feet in width, How many square feet of carpet does she need to buy?
11 x 12 =
132 square feet of carpet
13 x 13
( 4 x 4 ) x 4
64 units cubed
16
Write an expression: to solve 9 x 27 Ms. Longanecker does 10 groups of 27 then subtracts one group of 27.
(10 x 27) - (1 x 27)
Ms. Louis wants to buy her son some baseballs to practice. She needs to buy 96 baseballs and they come in sets of 12. How many sets does she need to buy?
96/12 =
8 sets of baseballs
13 x 21
273
(7 x 6) x 10
420 units cubed
25 x 26 = __ x 13
50
Write an expression: 15 divided by 3 then multiply by 12 and add 4
(15 / 3) x 12 + 4
Or
((15/3) x 12) + 4
Mr. Kitay just bought 225 pieces of candy for his class. The candy came in boxes of 25 and each one cost 6 dollars. How much money did Mr. Kitay spend?
225/25 = 9
9 x 6 = 54 dollars
26 x 24
624
(12 x 6) x 10
720 cubic units
76 x 24 = 12 x __
152
(100 x 24) - (1 x 24)
2400 - 24 = 2376
Ms. Longanecker wants to torcher her students by giving them a hard math problem. She wants to know if she bought 450 stickers to split in between 3 classes, how many would each class get? If each sticker cost 2 dollars, how much would she spend on stickers?
450 / 3 = 150
150 x 2 = 300 dollars