Workplace Math and PLAR Prep

Multiplication and Division

Multiplication is repeated addition. Multiplication is a quicker way to add the same number many times.

The sign for multiplication is a times sign X.

The numbers that are multiplied together are called factors and the answer is called the product.

For example:

8 x 5 = 40 To get the answer add the number 8 five times. 8 + 8 + 8 + 8 + 8 = 40

Use the same steps to multiply 2, 3, 4, or more digit numbers.

For example:

Multiply 355 x 225

1. Arrange in columns. Multiply, starting from the right. Regroup when necessary.

2. Multiply 355 x 5 to get part of the answer 1775 and that is the first partial product. You must regroup – when you multiply 5 x 5 you get

25. Write the 5 down and then carry the 2 to the next column. Then you multiply 5 x 5 again and add the 2 to get 27. Carry the 2 to the next

column. Next you multiply 3 x 5 and add 2 to get 17.

3. Place a zero to hold the ones place value before multiplying for the next partial product 355x 20 = 7100 (partial product).

4. Place a zero in the ones and tens place and multiply 355 x 200 = 71000.

5. Add partial products to get the final product.

Math #3 Multiplying and Dividing.pdf

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