解决数学中的幂问题

﹣0.25?÷(0.5)?+(1/8-1/2)×{(-1)的十次方}

= - (1/4)?÷(1/2)?+ (1/8 - 4/8) × 1

= - (1/16) ÷ (1/8) + ( - 3/8)

= - 1/2 - 3/8

= - 7/8

-3×(减三分之三)-4×(1-三分之二)-8(三分之二的平方)

= 9/2 - 4×1/3 - 8 ÷ (4/9)

= 9/2 - 4/3 - 8×9/4

= 9/2 - 4/3 - 18

= 27/6 - 8/6 - 18

= 19/6 - 108/6

= - 89/6