Question

Marque a(s) alternativa(s) correta(s): *
1 ponto
(-2/3) + (+1/4) = -5/12
(-4/7) + (-2/6) = -19/21
(+1/7) - (+1/3) = -4/21
(+2/3) - (+1/3) = 1/3
(-4/5) - (-1/8) = -27/40
(-3/4) - 5 = -23/4

Answer 1

Resposta:

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Answer 2

Resposta:

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