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Similar to Pre-Algebra 2.8 Adding Decimals
Similar to Pre-Algebra 2.8 Adding Decimals (20)
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Pre-Algebra 2.8 Adding Decimals
- 4. = +- -
5 - 8
-9 - 10
= +- -
6 - - 10
-3 - - 15
Review of last week:
- 6. What do you know about adding decimals?
Think-Pair-Share
- 7. What is a decimal?
A point or dot used to separate the whole number
part from the fractional part of a number.
- 8. Rules:
Same sign (+ +, - -)
add numbers together, keep sign
Different signs (+ - , - +)
find difference, take sign of higher number
- 9. Examples:
1) 2.8 + 14.5
2) -3.3 + 14.2
3) -9.17 + (-4.27)
4) 10.8 + -4.5
Same/Diff. Problem