Long multiplication − Russian Peasant's method
This method relies on the fact that it is easier to divide by 2 and multiply by 2 than to do the whole calculation.
This method relies on the fact that it is easier to divide by 2 and multiply by 2 than to do the whole calculation.
Set the sum out as shown. We usually put the smaller number first but this is not essential. You will get the same answer if the larger number comes first.