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5.8*9.9+0.58 怎么简便

=5.8×9.9+5.8×0.1 =5.8×(9.9+0.1) =5.8×10 =58

5.8*9.9*0.58 =5.8*5.8*0.99 =(6-0.2)*(6-0.2)*(1-0.01) =(36-2.4+0.04)(1-0.01) =33.64*(1-0.01) =33.64-0.3364 =33.3036

5.8x9.9+0.58 =5.8x9.9+5.8x0.1 =5.8x(9.9+0.1) =5.8x10 =58

5.8x9.28÷0.58 =5.8÷0.58x9.28 =10x9.28 =92.8

5.8x9.9 =5.8X(10-0.1) =5.8x10-5.8x0.1 =58-0.58 =57.42

5.8×1.9+58×0.19,要用简便。 解:根据提取公因式的简便方法, 原式=5.8x1.9+5.8x1.9 =5.8x2x1.9 =11.6x(2-0.1) =11.6x2-11.6x0.1 =23.2-1.16 =22.04

5.8x(10-0.1)=5.8x10-5.8x0.1=58-0.58=57.42

5.8x99.9 =5.8x(100-0.1) =5.8x100-0.58 =580-0.58 =579.42

5.8×9.9等于什么乘括号什么减什么 解: 5.8×9.9 =5.8×(10-0.1) =5.8×10-5.8×0.1 =58-0.58 =57.42

5.8X(99十9)的简便方法 =5.8x99+5.8x9 =5.8x100-5.8+5.8x10-5.8 =580+58-5.8x2 =639-11.6 =627.4

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