Multiplying Decimals Use this PowerPoint Show to refresh your memory about how to Multiply Decimals.

The decimal points do not have to line up. STEP 1 6.78 X 4.9 Re-write the decimal numbers so that the number with the most digits is on top. Make sure the last digits line up. Click the space bar to see an example 6.78 x 4.9 Reminder The decimal points do not have to line up. Click arrow to see step 2

STEP 2 Ignore the decimal points and multiply the same way you would multiply whole numbers. Click the space bar to see an example 3 3 7 7 6.78 There should be NO DECIMAL POINTS in your work! x 4.9 Don’t forget to put a zero down in the tenths place as a place holder. 61 2 1 Click arrow to see step 3 + 27 1 2 3 3 2 2 2

Click arrow to go to exit problems STEP 3 Count how many decimal places there are in the two numbers that you are multiplying. Click the space bar to see an example 2) Count over from the right, the number of places determined in step 1 and put the decimal point in the answer. Click the space bar to see an example 6.78 2 x 4.9 + 1 Click arrow to go to exit problems 61 2 1 + 27 1 2 . 3 3 3 2 2 2 # of decimal places that you put in your answer.

Click arrow to see answers EXIT PROBLEMS Directions: On a separate sheet of paper, complete the exit problems. Make sure everyone in your group completes the problems before you check the answers with the next slide Click arrow to see answers

1) 2) 0.64 x 0.7 0.98 x 7.3 0.448 294 + 6860 3) 7.154 5.76 x 0 .32 1152 + 17280 1.8432