To multiply decimals, you multiply the numbers as whole numbers and then count decimal places to determine where to place the decimal point in the answer. For the multiplication 1.3 x 3, you multiply 3 x 3 = 9 and 3 x 1 = 3, writing 39 without regard to decimals. Since there is one decimal place in the original numbers, the decimal point goes after the first digit in the answer, making 3.9.

1. Multiply Whole Numbers and Decimals Mrs. Young EMC 1

2. Remember…. When adding and subtracting decimals it was extremely important that you line up the decimals and place values… Well…. You don’t need to when you multiply; just multiply!

3. Step 1: Multiply 1.3 x 3 --- you don’t need to line up the decimal or place values! 1.3 3 Reminder: We always multiply from right to left. (3 x 3 = 9 ) We right down the unit, In this case 9 , Under the 3 9

4. Step 2: 1.3 3 9 3 We then multiply the 3 by the 1 (3 x 1 = 3) Write down the 3 next the 9

5. Step 3: Now we need to add the decimal point to our answer. 1.3 3 3 9 For correct decimal placement in your answer, you count how many numbers are to the right of the decimal in the actual problem. 1 0 (1 + 0 = 1) There will be one digit after the decimal point in the answer. Start at the right of the answer and move left that many spaces. .