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

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Presentation on theme: "Multiplying large numbers by splitting Created by: Sabrina Edmondson Adapted from BBC online."— Presentation transcript:

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 5. 5 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


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