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Grade 3 - Mathematics
5.4 Estimating Sums and Differences
Round the numbers to the places mentioned.
Add or subtract after estimation as per the question.
: 38 + 49 estimate is about _______.
Rounding both the numbers to the nearest tens place.
40 + 50
: 458 - 159
Rounding both the numbers to nearest hundreds
500 - 200
Find sums or differences after estimation. Also write at least ten examples of your own.
: 928 - 237 estimate is about ________ . (hint: estimate the difference of three digit numbers by rounding to nearest hundreds place, that is 900-200 = ?).
: 29 + 45 estimate is about ________ . (hint: estimate the sum of two digit numbers by rounding to nearest tens place, that is 30+50 = ?).
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