ffirs.indd

146 Speed Math for Kids
We have to be careful with the remainder. Th e 2 remainder we
obtained is not the remainder for the original problem. We will now
look at obtaining a valid remainder when we divide using factors.
Finding a remainder
Sometimes when we divide, we would like a remainder instead of a
decimal. How do we get a remainder when we divide using factors?
We actually have two remainders during the calculation.
Th e rule is:
Multiply the fi rst divisor by the second remainder
and then add the fi rst remainder.
For example:
34,567 ÷ 36
960 r1
6 5,761 r1 +
6 34,567
We begin by multiplying the corners
6 x 1 = 6
Th en we add the fi rst remainder, 1. Th e fi nal remainder is 7, or
⁄.
Test you rself
Try these for yourself, calculating the remainder:
a) 2,345 ÷ 36 =
b) 2,713 ÷ 25 =
The answers are:
a) 65 r5 b) 108 r13