Multiplying multi-digit numbers

Multiplication is a mathematical operation that represents the repeated addition of a number. For example, 4 x 3 means adding 4 three times (4 + 4 + 4).

A multi-digit number is a number that has two or more digits. For example, 145 and 81 are multi-digit numbers.

To multiply a multi-digit number by a single-digit number, multiply each digit of the multi-digit number by the single-digit number, starting from the rightmost digit.

1,160

To estimate the product, round each number to the nearest ten or hundred and then multiply the rounded numbers.

The area model is a visual way to represent multiplication by breaking numbers into parts. For example, to multiply 72 by 13, you can break 72 into 70 and 2, and 13 into 10 and 3.

The distributive property states that a(b + c) = ab + ac. It allows you to multiply a number by a sum by distributing the multiplication.

2,430

You can check your multiplication answer by using the inverse operation, which is division. Divide the product by one of the factors to see if you get the other factor.

A factor is a number that is multiplied by another number to get a product. For example, in 6 x 4 = 24, both 6 and 4 are factors.