Fast Math-Subtraction

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Quiz by lys60379
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Last updated: April 30, 2015
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First submittedApril 30, 2015
Times taken485
Average score90.0%
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Hint
Answer
34-87
-53
87-34
53
18-6
12
39-23
16
167-89
78
1-1
0
890-546
344
123-12
111
890-810
80
14-7
7
+1
Level 42
Aug 9, 2020
done second time with 30 seconds to spare
+1
Level 23
Oct 5, 2023
1:09 to spare