Adding & Subtracting Decimals 3-6
RULES TO FOLLOW:
1. Write the given numbers one above the other (STACK'EM) with the decimal points lined up!!
2. Add zeros to get the same number of decimal places and then add/sub just like whole numbers.
3. Place the decimal point in your sum/ difference in the position right under the decimal points in the given numbers.
6.47 + 340.8 + 73.523
STACK THEM!!
The use of rounded numbers to get an approximate answer is called estimation. We use estimates to check actual answers. You can see if your answer is reasonable by using estimation.
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