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3.1: Place Value Charts
Decimal: Shows numbers that are in-between numbers
1
2
In-Between Values: 1.2, 1.5, 1.7...
Place Value Chart:
Example 1) place 0.0139 on the place-value chart:
We can write this number in 2 forms:
Standard Form: 0.0139
Expanded Form: 0.01 + 0.003 + 0.0009
Practice
Practice PDFs available for download:
3.2: Multiplying Decimals
Example 1) Solve:
1.34
x2
Step 1) Multiply as normal:
1 3 4
x 2
2 6 8
Step 2) Count how many decimal places the original decimal had (1.34):
1. 3 4
1.34 has two decimal places, therefore our answer must also have two decimal places.
2.6 8
Practice
Practice PDFs available for download:
3.3: Dividing Decimals
Example 1) Divide:
4.92 / 3
Step 1) How many times does "3" fit into 4?
3
4 9 2
1
-3
1
9
Step 2) Multiply "3" by step1 #
Step 3) Subtract the product
3
4 9 2
1
-3
1
9
6
-18
1
2
Step 4) Drop down the next number
Step 5) Repeat for each number, left to right
3
4 9 2
1
-3
1
9
6
-18
1
2
4
-12
0
1.64
Practice
Practice PDFs available for download:
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