Multiply double digits by first multiplying the whole top number by the ones digit, then by the tens digit by using a zero as a placeholder and then adding the two products.
Continue ReadingPlace the two numbers with their digits lining up, and draw a line below them to signify multiplication. This makes it easier to keep track of the numbers while working out the problem.
Consult multiplication tables if necessary to determine this product. For example, when multiplying 43 and 53, the two 3s would be multiplied to yield 9. Write this 9 in the ones digit of the product.
If the product of the ones digits yielded a double-digit number, write the ones digit normally, and write above the tens digit of the top number the number that is to be carried. For example, if the ones digits were 3 and 4, the result would be 12. A 2 would be in the ones digit, while the 1 to represent 10 would be above the tens digit.
The zero represents a placeholder because now, the tens are being multiplied.
Double-digit multiplication involves adding two products, one for the ones digit and one for the tens digit.
Doing this will yield the result of multiplying two double-digit numbers.