3×(-9)+7×(-9) (5/4-7/6)×(-8/7) (-54)÷6÷(-3) (-54)÷6÷(-3) 2×{5+(-2)^3}-(2/13-1/3-1/6)×78 (-2/3)×27/8÷(3/2)^3 1/30-(-2/3+3/5)÷(-2)

问题描述:

3×(-9)+7×(-9) (5/4-7/6)×(-8/7) (-54)÷6÷(-3) (-54)÷6÷(-3) 2×{5+(-2)^3}
-(2/13-1/3-1/6)×78 (-2/3)×27/8÷(3/2)^3 1/30-(-2/3+3/5)÷(-2)

答案分别是:-90;-2/21 ;3 ;3 ;26