How To Multiply Numbers # 1

There’s a limit to the number of multiplication facts that can be remembered so we need step-by-step methods for multiplication with larger numbers. There is more than one method including the one shown below and this other way of multiplying numbers.

Multiplication – one way

3 x 13

o o o o o o o o o o o o o
o o o o o o o o o o o o o
o o o o o o o o o o o o o
We can split the 3 groups of 13 into:
3 groups of 3
and 3 groups of 10
Think of 13 in its expanded form. e.g. 3 + 10
o o o o o o o o o o
o o o
o o o
o o o
o o o o o o o o o o
o o o o o o o o o o
3 groups of 13
is the same as3 groups of 3
plus
3 groups of 10

3 x 3 plus 3 x 10
9 + 30
3 x 13 = 39

13 x 3

1 3
x 3
9
1 3
x 3
9
0
1 3
x 3
9
+ 3 0
1 3
x 3
9
+ 3 03 9
Multiply the onesPut a zero in the ones’ place as we’re multiplying tensAdd the products to get the answer

13 x 3 = 39

47 x 4

4 7
x 42 8
4 7
x 42 8
0
4 7
x 42 8
+ 1 6 0
4 7
x 42 8
+ 1 6 01 8 8
Multiply the onesPut a zero in the ones’ place as we are multiplying tensAdd the products to get the answer
47 x 4 = 188
318 x 6
3 1 8
x 64 8
3 1 8
x 64 8
0
3 1 8
x 64 8
+ 6 0
3 1 8
x 64 8
6 0
0 0
3 1 8
x 64 8
6 0
+ 1 8 0 01 9 0 8
Multiply the onesPut a zero in the ones place (as we are multiplying tens) and multiply the tensPut two zeros in the ones’ and tens’ placesMultiply the hundreds and add to get the answer
318 x 6 = 1908

Try the worksheets below for more practice with multiplying using the method shown above.

You’ll find more free multiplication worksheets here.