Multiplying with Decimals
Presentation
•
Mathematics
•
5th - 6th Grade
•
Easy
Standards-aligned
Jay Tran
Used 23+ times
FREE Resource
15 Slides • 10 Questions
1
Multiplying with Decimals
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Our friend: The place value chart
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4
Here we have a decimal.
Remember our place values!
5
Multiple Choice
In 2.34, which statement is correct?
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Now we have 1.2.
We're going to ignore the decimal in these numbers, so 1.2 becomes 12 and 2.34 becomes 234.
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To multiply numbers with decimals, we multiply as usual.
Just ignore the decimal signs for now!
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Using the area model
Or if you are confident in the traditional method of multiplying, that's okay too!
9
Multiple Choice
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Great! You found the answer!
But what about our decimals???
11
Let's take a step back and look at each individual multiplier.
We're not going to forget about our answer, but we'll come back to it.
12
Look at how many digits are after the decimal sign.
The numbers after the decimal sign is "3" and "4."
13
Multiple Choice
How many decimal places does 2.34 have?
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There are two numbers.
Keep that in mind!
15
Multiple Choice
What about in 1.2?
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What about in 1.2?
There is only one.
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How many decimal places did we have in total?
Let go back to our answer to 2.34 x 1.2, which was 2808!
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We need 3 decimal places in our answer of 2808.
So our 2808 becomes 2.808.
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Multiple Choice
In 8.2, how many decimal places are there?
21
Multiple Choice
In 5.5, how many decimal places are there?
22
Multiple Choice
8.2 x 5.5=4510 without decimals. What is the correct answer WITH decimals?
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Multiple Choice
How many decimal places are in 4.331?
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Multiple Choice
How many decimal places are in 9.21?
25
Multiple Choice
If 4.331 x 9.21= 3988851 without decimals, WITH decimals, the answer should be...
Multiplying with Decimals
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