Do you remember how to to the nearest 10,\, 100, or 1000?
Round 936 to the nearest ten.
How can we estimate the answer to an addition or subtraction problem?
Look at the number sentence:
6266-143 will be in the:
Find the value of 6266-143.
We can also estimate our answer to multiplication and division problems. In fact, the process is not that different to addition and subtraction. Let's see how, in this video.
Let’s estimate the solution to 24 \times 24 by rounding the digits first.
Rewrite the calculation but use rounded numbers to the nearest 10.
Calculate 20 \times 20.
Is 400 going to be larger or smaller than the actual result of 24 \times 24?
selects and applies appropriate strategies for addition and subtraction with counting numbers of any size
selects and applies appropriate strategies for multiplication and division, and applies the order of operations to calculations involving more than one operation