Two Digit by One Digit Multiplication

The standard algorithm for multiplication involves multiplying the digits of the numbers starting from the rightmost digit, carrying over any values as needed, and then adding the results together.

To multiply a two-digit number by a one-digit number, multiply the one-digit number by each digit of the two-digit number separately, starting from the rightmost digit, and then add the results together, taking care of any carries.

The product of 51 and 4 is 204.

The product of 72 and 3 is 216.

The product of 43 and 3 is 129.

The product of 61 and 6 is 366.

The product of 71 and 9 is 639.

'Carrying over' in multiplication refers to the process of transferring a value from one column to the next when the product of a digit exceeds 9.

Aligning numbers correctly ensures that each digit is multiplied by the correct place value, which is essential for obtaining the correct product.

The first step is to multiply the rightmost digit of the bottom number by the rightmost digit of the top number.