Estimate Sums and Differences

Flashcard
•
Mathematics
•
3rd Grade
•
Hard
+1
Standards-aligned
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1.
FLASHCARD QUESTION
Front
What is estimation in math?
Back
Estimation is a way to find a number that is close to the exact amount, often by rounding numbers.
2.
FLASHCARD QUESTION
Front
How do you round a number to the nearest hundred?
Back
Look at the tens digit: if it's 5 or more, round up; if it's 4 or less, round down.
Tags
CCSS.3.NBT.A.1
CCSS.4.NBT.A.3
3.
FLASHCARD QUESTION
Front
Estimate the sum of 250 + 370 by rounding to the nearest hundred.
Back
600
4.
FLASHCARD QUESTION
Front
Estimate the difference of 90 - 25 by rounding to the nearest ten.
Back
60
5.
FLASHCARD QUESTION
Front
What is the best estimate of 926 - 607?
Back
300
6.
FLASHCARD QUESTION
Front
How do you find the difference between two numbers?
Back
Subtract the smaller number from the larger number.
Tags
CCSS.7.NS.A.1C
7.
FLASHCARD QUESTION
Front
Estimate the sum of 327 + 431 by rounding to the nearest hundred.
Back
700
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