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Adding and Subtracting Multi-Digit Decimals
88
Transcript
Adding and Subtracting with Decimals
What are the steps?
What are the steps ?
Adding
1. Line up the numbers vertically with the decimals in line
2. Add
3. Bring the decimal down into the solution
Subtracting
1. Line the numbers vertically with the largest number on top and the decimals in a line
2. Fill in any missing zeros
3. Subtract
4. Bring the decimal point down into the solution.
Examples
Examples
Adding
3.14+2.89
Adding
1.
3.14 Line up numbers and
+ 2.89 decimals
6 03 Add
2.
6.03 Bring down the decimal
3.
Subtracting
3.14-2.89
Subtracting
1.
3.14 Line up the numbers
- 2.89 and the decimals
0 25 Subtract
2.
0.25 Bring down the
decimal
3.
Your Turn
5.2+7.25
7.77
a,
12.45
Problem
b,
77.5
c,
13.75
d,
12.45
Solution
When you line up the numbers, remember you may have to fill in missing zeros. In this case, 5.2 would actually be 5.20 to line up correctly with 7.25.
IXL Practice
IXL: H.1 and H.2
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