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9.5x2.8 8.2x9.5%9.5能不能简算

能简算 9.5x2.8+ 8.2x9.5-9.5 =9.5×(2.8+8.2-1) =9.5×10 =95

(4.5x9.9+5.5x9.9)x2.8 =[(4.5+5.5)×9.9]×2.8 =10×9.9×2.8 =99×2.8 =(100-1)×2.8 =100×2.8-1×2.8 =280-2.8 =277.2

乘法分配律啊 原式 =2.8X(9+0.05)+9.8X(1+0.05) =25.2+0.14+9.8+0.49 =35+0.63 =35.63

(4.5x9.9+5.5x9.9)x2.8 =[(4.5+5.5)×9.9]×2.8 =[10×9.9]×2.8 =99×2.8 =277.2 2.4x1.5+3.6÷1.5 =3.6+2.4 =6

(1) 3.14x26.4+31.4x7.35+0.314 =3.14x26.4+3.14x73.5+3.14x0.1 =3.14x(26.4+73.5+0.1) =3.14x100 =314 (2) 2.8x9.6x3.4/(1.4x3.2x1.7) =1.4x2x3.2x3x1.7x2/(1.4x3.2x1.7) =2x3x2 =12

55x66+66x77+77x88+88x99 =11x11x5x6+11x11x6x7+11x11x7x8+11x11x8x9 =11x11x(5x6+6x7+7x8+8x9) =11x11x(6x(5+7)+8x(7+9)) =11x11x(6x12+8x16) =11x11x(72+128) =121x200 =24200

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