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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+5.8×0.1 =5.8x(9.9+0.1) =5.8X10 =58

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

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

=5.8x(3.9+6.1) =5.8x10 =58

24 解析: (8-5+10-9)! =4! =4×3×2×1 =24

14.5*5.8+ 3.9 =29*2.9+2.9+1 =2.9(29+1)+1 =2.9*30+1 =87+1 =88

5.8×0.15+9.12 =58/10×15/100+9.12 =29/2×3/50+9.12 =0.87+9.12 =9.99

5.8x0.15+9.12 =0.87+9.12 =9.99 如有帮助请采纳, 如对本题有疑问可追问,Good luck!

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