ffirs.indd

108 Speed Math for Kids
Test you rself
Tr y the se :
a) 25 + 9 =
b) 46 + 9 =
c) 72 + 9 =
d) 56 + 8 =
e) 37 + 8 =
f) 65 + 7 =
The answers are:
a) 34 b) 55 c) 81
d) 64 e) 45 f) 72
You don’t have to add and subtract the way you were taught at
school. In fact, high math achievers usually use diff erent methods
than everyone else. Th at is what makes them high achievers—not
their superior brain.
How would you add 38? Add 40 and subtract 2.
So, how would you add the following?
a) 23 + 48 =
b) 126 + 39 =
c) 47 + 34 =
d) 424 + 28 =
For a), you would say 23 plus 50 is 73, minus 2 is 71.
For b), you would say 126 plus 40 is 166, minus 1 is 165.
For c), you would say 50 plus 34 is 84, minus 3 is 81.