Estimating Sums
Flashcard
•
Mathematics
•
3rd - 5th Grade
•
Practice Problem
•
Hard
+1
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is estimation in mathematics?
Back
Estimation is the process of finding an approximate value that is close enough to the right answer, often used when exact calculations are not necessary.
2.
FLASHCARD QUESTION
Front
How do you round a number to the nearest ten?
Back
To round a number to the nearest ten, look at the digit in the ones place. If it is 5 or greater, round up; if it is less than 5, round down.
Tags
CCSS.3.NBT.A.1
CCSS.4.NBT.A.3
3.
FLASHCARD QUESTION
Front
Estimate the sum of 71 and 85 by rounding each number to the nearest ten.
Back
70 + 80 = 150.
4.
FLASHCARD QUESTION
Front
Estimate the sum of 322 and 478 by rounding each number to the nearest hundred.
Back
300 + 500 = 800.
5.
FLASHCARD QUESTION
Front
What is the estimated sum of 123 and 456 when rounded to the nearest hundred?
Back
100 + 500 = 600.
6.
FLASHCARD QUESTION
Front
How do you estimate the sum of two numbers?
Back
To estimate the sum, round each number to a convenient value and then add those rounded values.
7.
FLASHCARD QUESTION
Front
What is the estimated sum of 62 and 35 when rounded to the nearest ten?
Back
60 + 40 = 100.
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