Ms. Sloan wanted to buy pizzas for the entire school. each pizza she ordered will serve 125 students. She purchased 256 pizzas in all. How many slices of pizza is this?
32,000
5X3
15
Solve: 2551 x 100
255,100
Solve using standard algorithm: 108 x 3
324
Frank says the product of 100 and 25 is 250. What mistake did he make?
He didn't add enough zeroes. 25 x 100 is 2,500.
What is the product of 1234 and 321?
396,114
6x4
24
Solve: 30 x 65
1,950
Solve using standard algorithm: 23×153
3519
Miranda says that multiplying 216 x 2 is the same as multiplying (21 x 2) + (6 x 2). What's her mistake?
She didn't break up her place values correctly.
(200 x 2) + (10 x 2) + (6 x 2)
A toy store has 25 action figures and 25 dolls. Each action figure is priced at $14, and each doll is priced at $8. How much more money does the store make from selling action figures than from selling dolls?
$150 more
12x8
96
Solve: 120 x 34
4,080
16×205=
3280
The population of City A is 1000 times as great as City B. City B has a population of 4,400. So Marco says the population of City A is 44,000. What's Marco's problem?
He didn't count the zeroes correctly. 4,400,000 is 1000 times greater than 4,400.
A toy store has 25 action figures and 25 dolls. Each action figure is priced at $14, and each doll is priced at $8. How much more money does the store make from selling action figures than from selling dolls?
$150 more
9x7
63
209 x 32
6,688
Solve using standard algorithm: 336×275=
92,400
Veronica solved the problem 435 x 25 like this:
What's her problem?
Your neighbor is planning to use a lawnmower for the 3 months in summer. He can either rent a lawnmower for $35 per month with a one-time fee of $50, or he can buy a lawnmower for $150. What would be the more cost-effective choice for him, renting or buying the lawnmower?
To BUY it would be cheaper as it is only $150. To rent is $155
25x3
75
371 x 145
53,795
Solve using standard algorithm: 4231×153=
647,343
Jake went to the store to buy enough crayons for his class to do an art project. There are 24 kids in his class and he wants each of them to have at least 8 crayons. He finds boxes of 12 crayons each so he buys 15 boxes. Why won't he have enough?
He needs 16 boxes.
There are 24 kids and each need 8 crayons. 24 x 8 is 192.
15 boxes of 12 crayons each equals 180 crayons. He won't have enough.