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How to multiply and divide Decimals

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by

swetha ananth

on 21 November 2013

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Transcript of How to multiply and divide Decimals

How to multiply and divide Decimals
How do you multiply decimals?
Do you need help to multiply decimals? Well, in this slide, you will learn how to multiply decimals.
Step 1: Line up Step 2:Work out the step 3: use the
the decimals virtually. problem. Think as if decimal rule
the decimals the decimals are not which is count
DON'T LINE UP THE there. the number of
DECIMALS! 326 spaces it takes
32.6 x 42 to get to the
x 4.2 _____ decimal from the
_____ 652 right .
+ 13040 32.6
_______ x 4.2
13692 _______
136.92




how to divide decimals
In this slide , I will teach you how to divide decimals.
Step 1: Divide normaly. Step 2: Bring the decimal right
Pretend the decimal is on up.
not there. 5.761
5 7 6 1 6 34.566
6 34.566
30
______
45
42
_______
36
36
_________
06
6
___________
0

Estimating your answer
You can check if your answer is right by estimating. The multiplication problem was 32.6 x 4.2 = 136.92. You would estimate 32.6 to 33 and you would estimate 4.2 to 4. 33 x 4 = 132. this answer is close to the real answer. The division problem was 34.566 / 6 = 5.761.
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