怎样简便计算18乘以45加24乘以55?
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![怎样简便计算18乘以45加24乘以55?](/uploads/image/z/129346-34-6.jpg?t=%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%9718%E4%B9%98%E4%BB%A545%E5%8A%A024%E4%B9%98%E4%BB%A555%3F)
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怎样简便计算18乘以45加24乘以55?
怎样简便计算18乘以45加24乘以55?
怎样简便计算18乘以45加24乘以55?
18x45+24x55
=18x45+(6+18)x55
=18x(45+55)+6x55
=1800+330
=2130
18x45+24x55=30x(3x9+4x11)=30x(27+44)=71x30=2130
18x45+24x55
=18x45+(6+18)x55
=18x(45+55)+6x55
=1800+330
=2130
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