(-3/5)×3/5+9/25×(-24) 简便计算

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(-3/5)×3/5+9/25×(-24) 简便计算
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(-3/5)×3/5+9/25×(-24) 简便计算
(-3/5)×3/5+9/25×(-24) 简便计算

(-3/5)×3/5+9/25×(-24) 简便计算
(-3/5)×3/5+9/25×(-24)
=-9/25+9/25×(-24)
=-9/25×(1+24)
=-9/25×25
=-9

原式=-9/25+9/25*(-24)=(-1-24)*(9/25)=-9