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4.8%4.8x0.5的梯式简便运算

6.43-0.5×6.43 =6.43×(1-0.5) =6.43×0.5 =3.215 你好,本题已解答,如果满意 请点右下角“采纳答案”。

2.4x1.2x0.5 =2.4x(1.2x0.5) =2.4x0.6 =1.44

(8x6+8x4+6x4)x0.5 =(48+32+24)x0.5 =48x0.5+32x0.5+24x0.5 =24+16+12 =52

0.485×102-48.5 简便计算 =48.5x1.02-48.5 =48.5x(1.02-1) =48.5x0.02 =0.97

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