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75x98十150的简便运算

75x98=75x(100-2)=7500-150=7350

提取公因式75X98十2X75=75X(98十2)=75X100=7500

75X(90+8)

78X98十156 解:=78x98+78x2 运用乘法分配律=(98+2)x78=100x78=7800 祝学习进步.

75X(100一2)75X100一75X27500一150

0.75x98=0.75*(100-2)=0.75*100-0.75*2=75-1.5=73.5

65x98十30的简便计算 解:原式=65*(100-2)+30=65*100-65*2+30=6500-(130-30)=6500-100=6400

75十150 ÷(30一5)=75+(150 ÷ 25)=75+6=81

75*89+75 =75*(89+1) =75*90 =75*(100-10) =75*100-75*10 =7500-750 =6750 最正确的方法

你好!78*98=78*(100-2)=78*100-78*2=7644 祝你学习进步,望采纳,如有疑问,尽可追问,谢谢!O(∩_∩)O~

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