Word Problems
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 52
26,104
30 × 65
1,950
ESTIMATE YOUR ANSWER:
108 x 3
about 300
5 x 1000
5000
A movie theater has two rooms. Room A has 9 rows of seats with 18 seats in each row. Room B has three times as many seats as Room A. How many seats are there in both rooms?
There are 648 seats in both rooms
1,305 x74
96,570
use an area model to solve:
47 x 23
1,081
ESTIMATE YOUR ANSWER:
581 x 19
about 12,000
8 x 104
80,000
Last year Mr. Petersen was able to plant 14 rows of carrots with 10 plants in each row. This year he plans to plant twice as many rows with twice as many carrot plants in each. How many carrot plants will he plant this year?
280
6,034 x 55
331,870
Use the standard algorithm to solve: 12 x 34
408
ESTIMATE YOUR ANSWER:
419x24
about 10,000 OR 8,000
Anna solved 135 x 527 using estimation. Based on what you know about estimation, would her answer be an overestimate or underestimate compared to the exact answer?
It would most likely be an Underestimation.
Jayden has 34 marbles. Elvis has 12 times as many as Jayden. How many marbles does Elvis have?
408
543 x 124
67,332
209 x 32
6,688
ESTIMATE YOUR ANSWER:
322x72
about 21,000
If I use estimation to solve 372 x 27 by rounding to get 400 x 30, will my answer be an overestimate or underestimate? EXPLAIN.
It will be an overestimate because I rounded both 372 and 27 up. My actual answer will be lower than my estimate.
The Turner family uses 248 liters of water per day. The Hill family uses 12 times as much water per day. How much water does the Hill family use per week?
11,508 liters
1,343 x 213
286,059
371 x 45
* SHOW HOW YOU CAN USE ESTIMATION TO CHECK YOUR ANSWER'S REASONABLENESS*
16,695
John saved $389 every week for a year. About how much will he save throughout the whole year?
about 20,000
John solved this problem 38 x 54 and got 272. Is his answer reasonable or not?
BONUS - 100 points if you can figure out what his mistake was!
It is not reasonable because if I use estimation, then 40 x 50 is 2000. His answer is not nearly high enough to make sense.