Nathalia spent 1 1/2 hours in an online class, and it took 2 2/3 hours to answer her module. How long did Nathalia spend time in studying?

Correct answer:

t =  4 16 = 25/6 h

Step-by-step explanation:

a=121=1+21=21 2+1=22+1=23=1.5 h b=232=2+32=32 3+2=36+2=382.6667 h  t=a+b=23+38=69+616=69+16=625=625 h=461 h=4.1667 h

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