Column multiplication: 3 digits by 1 digit, with carrying

Introduced in the Year 4 curriculum as: "Multiply two-digit and three-digit numbers by a one-digit number using formal written layout"

When doing column multiplication, if a result is more than 10,

write in the ones digit and carry the tens digit.

Press SHOW/HIDE if you need to do jottings.


Example 1:

6 multiplied by 2 is 12, so we record the 2 in the Ones column

and carry the Tens value.


Example 2:

When 6 is multiplied by 2 in the Tens column we get 12, so we record

the 2 in the Tens column and carry the 1 into the Hundreds column.


Example 3:

Sara says, 'I have 2 carries in my workings here'. Is she correct?

4 multiplied by 3 is 12. We write 2 in the Ones column and carry 1 into the Tens.

4 multiplied by 4 is 16. Add the 1 we carried to make 17. We write 7 in the Tens column and carry 1 into the Hundreds.

4 multiplied by 1 is 4. Add the 1 we carried to make 5. There are only two carries!


Example 4:


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