Calcule os valores racionais de:?

a) 3/4 + 1/6

b) 2/5 - 1/6 + 1/2

c) 1 - 0,1

d) 2+1,3-0,4

e) 2/5 x 1/4 - 1/10

f) A f é essa ai toda de baixo

1+2/5

2-1/4 -3 =

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