第42页 - 经纶学典学霸七年级数学上下册【江苏国标】

D

A

-a²

a⁴b⁴

2¹⁰

a⁴

3

±2

$ \begin{aligned}解：原式&=-a⁶÷a² \\ &=-a⁴. \\ \end{aligned}$

$ \begin{aligned}解：原式&=-x¹⁰÷(-x⁶)·(-x⁴) \\ &=-x⁸. \\ \end{aligned}$

$ \begin{aligned} 解：原式&=b^{6n}·b^{12n}÷b^{5n} \\ &=b^{13n} \\ \end{aligned}$

$ \begin{aligned}解：原式&=(m²n³)⁴ \\ &=m⁸n¹². \\ \end{aligned}$

$ \begin{aligned}解：原式&=(b-a)⁶÷(b-a)³ \\ &=(b-a)³. \\ \end{aligned}$

$ \begin{aligned}解：原式&=-(x-y)¹⁰÷(x-y)⁵÷(x-y)³ \\ &=-(x-y)² \\ \end{aligned}$

A

B