Respondido

Calcule as expressões -2-5×(-4+2×3)-5×[2-3×(-1)]

Resposta :

Resposta:

3/4 ÷ (-2/3)

》0,75 ÷ (-0,66)

》1,13

4/3.(3/5-1/2)-1/2.(1/3-1/7)

4/3.(6-5/10)-1/2.(7-3/21)

4/3.1/10-1/2.4/21

4/30 - 4/42 (÷2)

2/15 - 2/21

7 - 5/105

2/105

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