Arelli

Arelli had 20 minutes to do a three-problem quiz. She spent 9 7/10 minutes on question A and 3 2/5 minutes on question B. How much time did she have left for question C?
Solve on paper to find the answer as a fraction.

Correct result:

c =  6.9 min

Solution:

t=20 min a=9710=9 10+710=9710=9.7 min b=325=3 5+25=175=3.4 min  c=tab=209.73.4=6910=6910 min=6.9 min



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