C.5 Estimate differences
Estimate the total by rounding each number to the nearest hundred first, then subtract.
531 − 298
The difference is about .
645 − 312
693 − 352
Which subtraction problem has a difference of about 60?
Estimate the total by rounding each number to the nearest ten first, then subtract.
88 − 41
874 − 421
82 − 21
782 − 249
728 − 381
Which subtraction problem has a difference of about 500?
96 − 17
Which subtraction problem has a difference of about 300?
74 − 33
65 − 24
Which subtraction problem has a difference of about 40?
Which subtraction problem has a difference of about 90?
Which subtraction problem has a difference of about 200?
Your score is
The average score is 12%
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