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*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

11.11×2.8=(10+1+0.1+0.01)×2.8

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

99.99X0.8+11.11X2.8 =11.11X9X0.8+11.11X2.8 =11.11X7.2+11.11X2.8 =11.11X(7.2+2.8) =11.11X10 =111.1

是两道题吗?

99.99x0.8+11.11x2.8怎么简便 =11.11x7.2+11.11x2.8 =11.11x(7.2+2.8) =11.11x10 =111.1

(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...

=11×5.4 =(10+1)×5.4 =10×5.4+1×5.4 =54+5.4 =59.4

-7.2+6.3-2.8+11.7 =-7.2-2.8+11.7+6.3 =18-10 =8

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