62 Speed Math for Kids
15 + 1 = 16
5 4 × 4 = 30
–1
–1
15
- 1
16 Answer
Test you rself
Now try the following:
a) 3 × 4 = d) 3 × 6 =
b) 3 × 3 = e) 3 × 7 =
c) 6 × 6 = f) 4 × 7 =
The answers are:
a) 12 b) 9 c) 36
d) 18 e) 21 f) 28
I’m sure you had no trouble doing those.
I don’t really think this is the easiest way to learn those tables. I
think it is easier to simply remember them. Some people want to
learn how to multiply low numbers just to check that the method
will work. Others like to know that if they can’t remember some of
their tables, there is an easy method to calculate the answer. Even if
you know your tables for these numbers, it is still fun to play with
numbers and experiment.
Multiplication by 5
As we have seen, to multiply by 5 we can multiply by 10 and then
halve the answer. Five is half of 10. To multiply 6 by 5, we can
multiply 6 by 10, which is 60, and then halve the answer to get 30.