Adding and Subtracting Decimals
The Mathematician will solve additions and subtraction rational number operations focusing on decimals and integers.
Word problems will always have key words that will let you know if you should add or subtract. Here is a list of the most common used words.(Copy in you notebook)
Read about adding and subtracting decimals below.
Steps for Adding and Subtracting Decimals
(Copy in notebook)
- Write down the number, one under the other with the decimal points lined up.
- Put in Zeros so the numbers are the same length
- Then Add and Subtract and remember to align the decimal in your answer as well.
More Examples!!!
Work the following problems in your journal. Choose 1 question an explain you thought process and answer below under comments.
1. Three members of a cross-country relay team run 3.4, 2.73, and 5.6 minutes to complete his or her race. How long did it take the three members to run?
2. Vanessa downloaded two apps which were 17.73 kb total. If one app was 8.63 kb, how big was the other app?
3. Nancy was buying food for a birthday party. She bought a 52.93 oz bag of Takkis and a 79.6 oz bag of Lays potato chips. How many ounces did she buy altogether?
4. Richard bought 8.3 oz of oatmeal and gave his neighbor 1.1 oz. How many ounces does he have left?
Who do you agree with and why?
