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Timothy stated that the sum of 0.9 + (-9/10) was 18/20. What mistake(s) did Timothy make? What is the sum of 0.9 + (-9/10)?​

Timothy stated that the sum of 0.9 + (-9/10) was 18/20. What mistake(s) did Timothy make? What is the sum of 0.9 + (-9/10)?​
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5 votes
Timothy stated that the sum of 0.9 + (-9/10) was 18/20.

What mistake(s) did Timothy make?
What is the sum of 0.9 + (-9/10)?​

asked
User Esteban Feldman
by
7.8k points

2 Answers

3 votes
The sum is 0 he added instead of subtracting, you can’t add .9 and /.9 it cancels out
answered
User Pastor
by
8.4k points
3 votes

Answer:

18/10

Explanation:

answered
User Nhqazi
by
8.4k points
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