The high school art teacher has 10 cases of crayons with 52 boxes in each case. The elementary school art teacher has 6 cases of crayons with 104 boxes in each case. How many total boxes of crayons do both teachers have?
1,144 boxes of crayons
502 x 5
2560
30 × 65
1,950
ESTIMATE YOUR ANSWER:
108 x 3
about 300
4 x 103
4000
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
1,305 x7
9,135
Solve
47 x 23
1,081
Estimate 23×153= using the compatible numbers 20 and 150. Is your answer an overestimate or an underestimate?
underestimate
8 x 104
80,000
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 would cost $155
6,034 x 5
30, 170
Use the standard algorithm to solve: 12 x 34
408
Estimate 16×205= using the compatible numbers 15 and 200. Is your answer an overestimate or an underestimate?
Underestimate
The population of Country A is 105 times as great as Country B. Country A has a population of 440,000,000. What is the population of Country B?
4,400
Which two-digit number when multiplied by itself has a product of 3481?
Hint**** 10x10=100
20x20=400
30 x 30 = 900
59
52x9
468
209 x 32
6,688
Estimate 36×275= using the compatible numbers 40 and 300. Is your answer an overestimate or an underestimate?
Overestimate
The population of Country A is 102 times as great as Country B. Country A has a population of 440,000,000. What is the population of Country B?
4,400,000
Which two-digit number when multiplied by itself has a product of 1156?
34
1,343 x 5
6,715
371 x 145
53,795
Estimate 31×153= using the compatible numbers 30 and 150. Is your answer an overestimate or an underestimate?
Overestimate
***BONUS****
You use a pair of shoes to measure a distance. The shoes are 10 and 1/4 inches long. This distance is equal to the length of 8 shoes. What is the distance?
8 x 10 = 80
1/4 x 8 = 2
Total distance: 82 inches