(0.25a²b-1/2a³b²-1/6a⁴b³)÷(-0.5a²b)=?

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(0.25a²b-1/2a³b²-1/6a⁴b³)÷(-0.5a²b)=?(0.25a²b-1/2a³b²-

(0.25a²b-1/2a³b²-1/6a⁴b³)÷(-0.5a²b)=?
(0.25a²b-1/2a³b²-1/6a⁴b³)÷(-0.5a²b)=?

(0.25a²b-1/2a³b²-1/6a⁴b³)÷(-0.5a²b)=?
=(1/4a²b-1/2a³b²-1/6a⁴b³)÷(-1/2a²b)
=(-1/2a²b)(-1/2+ab+1/3a²b²)÷(-1/2a²b)
=-1/2+ab+1/3a²b²
先化分数 再提公因式