Education.com

# Whole Numbers Study Guide: GED Math (page 2)

By LearningExpress Editors
LearningExpress, LLC

### Whole Number Multiplication and Division

In multiplication, you combine the same amount multiple times. In some cases, multiplication can be used instead of addition. For example, instead of adding 60 four times, 60 + 60 + 60 + 60, you could simply multiply 60 by 4. If a problem asks you to find the product of two or more numbers, you should multiply.

Example

Find the product of 12 and 16.

Line up the place value as you write up the problem in columns. Multiply the ones of the top number by the ones of the bottom number: 2 × 6 = 12. Write the 2 in the ones place in the first partial product. Regroup the 10.

Multiply the tens place in the top number by 6: 6 × 1 = 6. Then add the regrouped amount: 6 + 1 = 7. Write the 7 in the tens column of the partial product.

Now multiply by the tens place of 16. Write a placeholder 0 in the ones place in the second partial product, because you're really multiplying the top number by 10. Then multiply the top number by 1: 1 × 2 = 2. Write 2 in the partial product next to the zero. Multiply 1 by the top number in the tens place: 1 × 1 = 1. Your total second partial product is 120.

In division, the answer is called the quotient. The number you are dividing by is called the divisor and the number being divided is the dividend. The operation of division is finding how many equal parts an amount can be divided into.

Example

Find the quotient of 72 divided by 3.

Set up a long division problem with 3 as the divisor and 72 as the dividend:

What times 3 equals 7, or a whole number closest to 7? 3 × 2 = 6, so this is your best choice. Write a 2 over the 7 in the dividend. 7 – 6 = 1, which is the remainder. Bring down the 2.

What times 3 equals 12? 3 × 4 = 12. Write a 4 over the 2 in the dividend.

The quotient of 72 divided by 3 is 24.

Practice problems for these concepts can be found at:

Numbers and Operations Practice Problems: GED Math

150 Characters allowed

### Related Questions

#### Q:

See More Questions