4.6×2.1-2.1的简便运算
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你好,4.6×2.1-2.1=4.6x2.1-2.1=(4.6-1)x2.1=3.6x2.1=7.56
咨询记录 · 回答于2022-09-05
4.6×2.1-2.1的简便运算
2.1×8.64-2.1
你还在吗?
你好,4.6×2.1-2.1=4.6x2.1-2.1=(4.6-1)x2.1=3.6x2.1=7.56
2.1×8.64-2.1=2.1x(8.64-1)=2.1x5.64=(2+0.1)x5.64=2x5.64+0.1x5.64=11.28+0.564=11.844
计算完成
2.1×8.64-2.1=2.1x(8.64-1)=2.1x7.64=(2+0.1)x7.64=2x7.64+0.1x7.64=15.28+0.764=16.044
正确答案2.1×8.64-2.1=16.044