Estimating Sums & Differences: Fun 3-Digit Challenges
Authored by Anthony Clark
English
2nd Grade
CCSS covered
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A bakery made 245 cookies in the morning and 378 cookies in the afternoon. How many cookies did they make in total? Estimate the sum first.
500
700
623
600
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
There are 512 apples in a basket. If 178 apples are taken out, how many apples are left? Use a number line to help you calculate.
512
178
334
3340
Tags
CCSS.2.NBT.B.7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A library has 345 books. If they buy 256 more books, how many books will they have altogether? Estimate the total first.
700
601
500
600
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A toy store had 678 toys. They sold 289 toys. How many toys are left in the store? Use a number line to find the answer.
350
389
400
450
Tags
CCSS.1.NBT.C.4
CCSS.2.MD.B.6
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A farmer harvested 423 carrots and then harvested 189 more. How many carrots did he harvest in total? Estimate the sum before calculating.
500
600
700
612
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a classroom, there are 256 pencils. If 134 pencils are given to students, how many pencils remain? Use a number line to solve this problem.
122
200
150
130
Tags
CCSS.2.NBT.B.7
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A zoo has 512 visitors in the morning and 289 visitors in the afternoon. How many visitors did the zoo have that day? Estimate the total first.
700
801
600
900
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