www.qprq.net > 99.99*0.8.11*2.8谁能帮我解决简便算法,要过程...

99.99*0.8.11*2.8谁能帮我解决简便算法,要过程...

99·99分成9个11.11

99.99*0.8+11.11*2.8 =11.11*(9*0.8)+11.11*2.8 =11.11*7.2+11.11*2.8 =11.11*(7.2+2.8) =11.11*10 =111.1

99.99*0.8+11.11*2.8 =(100-0.01)*0.8+11.11*(3-0.2) =100*0.8-0.01×0.8+11.11*3-11.11*0.2 =80-0.008+33.33-2.222 =111.1

11.11(9x0.8十1x2.8) =11.11(7.2十2.8) =11.11X10 =111.1

是两道题吗?

(1)3.74×2.85+8.15×3.74-3.74=3.74×(2.85+8.15-1)=3.74×10=37.4;(2)99.99×0.8+11.11×2.8=11.11×7.2+11.11×2.8=11.11×(7.2+2.8)=11.11×10=111.1;(3)31.4×0.68+314×0.032=314×0.068+314×0.032=314×(0.068+0.032)=314×0.1=31.4;(4...

(1)3.74×2.85+8.15×3.74-3.74=3.74×(2.85+8.15-1)=3.74×10=37.4;(2)99.99×0.8+11.11×2.8=11.11×7.2+11.11×2.8=11.11×(7.2+2.8)=11.11×10=111.1;(3)31.4×0.68+314×0.032=314×0.068+314×0.032=314×(0.068+0.032)=314×0.1=31.4;(4...

简算: 99.9x0.8+11.1x2.8 =11.1x9x0.8+11.1x2.8 =11.1x7.2+11.1x2.8 =11.1x(7.2+2.8) =11.1x10 =111

你好,很高兴为你解答 2.75×31/5+2.8÷4/11+11/4简便(要步骤) 2.75=11/4 具体过程如下图。

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