Question

$\frac{1} - {4} \frac{2} + {5} =$



$\frac{6} + {7} \frac{8} + {10} =$



$\frac{1} - {5} \frac{4} + {5} =$



$\frac{1} - {7} \frac{8} + {7} =$




$\frac{ 12} - {7} \frac{8} + {10}$
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Answer 1

Resposta:

continua ruim...

a)

se for 1/4 +2/5  

5*1/(4*5)  + 2*4/(4*2)  =5/20+8/20=13/20

b)

se for 6/7+8/10

6*10/(7*10) + 8*7/(10*7) =60/70+56/70 =116/70 =58/35

c)

se for 1/5+4/5     =5/5=1

d)

se for 1/7+8/7 =9/7