Transcript Addition and Subtraction with Decimals

Addition and Subtraction with
Decimals
Today you will learn to:
• solve problems by adding and subtracting fractions.
M07.A-N.1.1.1, M07.A-N.1.1.2: To apply properties of operations to
add and subtract rational numbers, including real-world contexts; To
represent addition and subtraction on a horizontal or vertical
number line.
Warm-up Problem: Subtracting
Decimals
The average length of a humpback
whale is 13.7 meters. The average
length of a killer whale is 6.85
meters. How much longer is the
humpback whale than the killer
whale?
Adding and Subtracting Decimals
RULE: When adding and/or subtracting decimals, be sure to
align the decimal points.
NOTE: If necessary, insert zeros at the end of each so that
each has the same number of decimal places.
2.310
19.100
+ 1.882
23.292
19.100
- 1.882
17.218