1. Multiplying large numbers by splitting
Created by: Sabrina Edmondson
Adapted from BBC online

2. Multiplying large numbers by splitting
Have a look at the following equation:
255 x 5

3. Multiplying large numbers by splitting
First split the number into hundreds, tens and ones.
255 splits into 200, 50 and 5

4. Multiplying large numbers by splitting
Then, multiply each of the numbers by x 200 = x 50 = x 5 = 25

5. Multiplying large numbers by splitting
This method can be represented in a grid, as shown below.

6. Multiplying large numbers by splitting
Finally, add the three numbers together to get your answer. + +

7. Multiplying large numbers by splitting
So 255 x 5 = 1,275
Remember: check the answer by doing the opposite! 1,275 ÷ 5 = 255

8. Multiplying large numbers by splitting
Now have a look at this equation:
255 x 25

9. Multiplying large numbers by splitting
First split the number into hundreds, tens and ones.
255 splits into 200, 50 and 5 (these go along the top)
25 splits into 20 and 5 (these go along the sides)

10. Multiplying large numbers by splitting
Then, multiply each number in the column by each number in the row.
Have a look at the grid below.

11. Multiplying large numbers by splitting
Add up each column, then add the resulting numbers together. + +

12. Multiplying large numbers by splitting
So 255 x 25 = 6,375
Remember: check the answer by doing the opposite! 6,375 ÷ 25 = 255