Year 4

We can multiply a two-digit number by a one-digit number

Year 4 Unit 13a

What we are learning:

When we multiply two numbers together we call the answer the product.
The product of 5 and 7 is 35.

Schools often teach children how to use a simple grid to layout multiplication calculations. This is known as “Grid Multiplication”.
To calculate 4 x 13, the 13 is partitioned into 10 and 3. Each part is now multiplied by 4.

4 x 10 is 40
4 x 3 is 12.
The 40 and 12 are then added together to make a total of 52.

ACTIVITY 1: MULTIPLYING WITH THE GRID METHOD

ACTIVITY 2: CHILDREN USING THE GRID METHOD

Activities you can do at home:

Work through the following practice multiplication questions together.
Use the Grid Method.
19 x 4, 23 x 8, 12 x 9, 27 x 5, 26 x 9, 18 x 2

Good questions to ask and discuss:

How can we partition this number into tens and units?
What do we have to do when we have multiplied each part?

If your child:

Finds remembering the sequence of activity difficult
Take time to talk through each stage. The important elements are that:

By partitioning the two digit number in the grid we do not change its value, just its appearance to make it easier to multiply

We have to multiply both parts first, then add the answers together to find the total