作业帮22.8*98+45.6这道题简便计算怎么做(递等式计算)
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22.8*98+45.6这道题简便计算怎么做(递等式计算)
22.8*98+45.6这道题简便计算怎么做(递等式计算)
22.8*98+45.6这道题简便计算怎么做(递等式计算)
=22.8*98+22.8*2
=22.8*(98+2)
=22.8*100
=2280
= 22.8(98+2)
= 2280
22.8*98+45.6=22.8*(100-2)+45.6=22.8*100-22.8*2+45.6=2280-45.6+45.6=2280
一楼正解
22.8*98+22.8*2
=22.8*(98+2)
=22.8*100
=2280
=22.8*98+22.8*2
=22.8*(98+2)
=22.8*100
=2280
一楼
22.8*98+22.8*2=22.8*(98+2)=2280
22.8*98+45.6
=22.8*98+22.8*2
=22.8*(98+2)
=22.8*100
=2280
45.6=22.8*2 所以22.8*98+45.6=22.8*（98+2）=22.8*100=2280
22.8*98+22.8*2
=22.8*(98+2)提取公因式22.8
=22.8*100
=2280
=22.8*(100-2)+45.6
=22.8*100-22.8*2+45.6
=2280-45.6+45.6
=2280