Multiplication Grids
Multiplying a 2 digit
number by a 1 digit
number.
Our questions says:
23 x 5 = ?
Today we are going to
use the grid method
to help us work out
our answer, so firstly
you will need to draw
a grid like this on
your whiteboard.
Now look at your question again.
23 x 5 = ?
Lets partition the number larger number to make
it easier for us to work out the answer.
23 = 20 + 3
You are now going to
transfer all the information
we have onto the grid.
x
Firstly, where am I going
to put the x sign?
20
Next, where am I going to
put my single digit?
3
Finally, where am I going
to write my partitioned
number?
5
Now I am going to work out
my answer.
Firstly, times the digit on
the top row by one of
the numbers at the side.
Write the answer on the
grid.
Repeat for the other
number.
Finally, add these two new
numbers together.
x
5
20 100
3
15
= 115
Have a go at these yourself.
27 x 4 = ?
36 x 3 = ?
X
4
X
3
20
80
30
90
7
28
6
18
= 108
= 108