
3rd Grade: Estimating Sums & Differences in Math Challenge
Authored by Anthony Clark
English
3rd Grade
CCSS covered

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A bakery sold 245 cupcakes on Monday and 378 cupcakes on Tuesday. How many cupcakes did they sell in total? Estimate the sum first.
500
600
623
700
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A library has 512 books. If 178 books are checked out, how many books are left in the library? Check if your answer is reasonable by estimating.
250
334
400
300
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A toy store had 625 toys. They sold 289 toys during a sale. How many toys are left? Estimate the difference before calculating.
400
300
336
250
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Emma has 432 stickers. She gave 145 stickers to her friend. How many stickers does Emma have now? Estimate the difference to check your answer.
250 stickers
300 stickers
287 stickers
287
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A farmer harvested 345 apples and 267 oranges. How many fruits did he harvest altogether? Estimate the total before solving.
400
350
500
612
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A school has 789 students. If 456 students are present today, how many students are absent? Estimate the difference to see if your answer makes sense.
400
250
333
500
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A zoo has 215 animals. They received 128 more animals. How many animals are there now? Estimate the total before calculating the exact number.
343
300
215
400
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