2.1×4.6+21×0.23+0.21的简便方法怎么算
2.1×4.6+21×0.23+0.21的简便方法
=21x0.46+21x0.23+21x0.01
=21x(0.46+0.23+0.01)
=21x0.7
=14.7
=21x0.46+21x0.23+21x0.01
=21x(0.46+0.23+0.01)
=21x0.7
=14.7
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第1个回答 2017-07-07
21*0.46+21*0.23+21*0.01=21*（0.46+0.23+0.01）=21*0.7=14.7
第2个回答 2017-07-07
14-7.32-2.68 =14-(7.32+2.68) =14-10 =4 0.8×（4.3×1.25） =0.8×1.25×4.3 =1×4.3 =4.3 1.23+3.4-0.23+6.6 =1.23-0.23+(3.4+6.6) =1+10 =11 28.6×101-28.6 =28.6×(101-1) =28.6×100 =2860 6.032+3.6+1.98 =9.632+1.98 =9.632+2-0.02 =11.632-0.2 =11.612
第3个回答 2017-07-07
可以这样算2.1X（4.6+2.3+0.1）=2.1X7=14.7，忘采纳
第4个回答 2017-07-07
=21x0.46+21x0.23+21x0.01
=21x(0.46+0.23+0.01)
=21x0.7
=14.7
=21x(0.46+0.23+0.01)
=21x0.7
=14.7
第5个回答 2017-07-07
2.1×4.6+21×0.23+0.21
=2.1x(4.6+2.3+0.1)
=2.1x7
=14.7
=2.1x(4.6+2.3+0.1)
=2.1x7
=14.7
