Question

16.用简便方法计算 0.41*25.5+0.035*255+2.4*2.55？

Answer 1

0.41*25.5+0.035*255+2.4*2.55
=25.5*（0.41+0.35+0.24）
=25.5*1
=25.5

Answer 2

0.41×25.5+0.035×255+2.4×2.55
＝4.1×2.55+3.5×2.55+2.4×2.55
＝2.55×(4.1+3.5+2.4)
＝2.55×10
＝25.5

Answer 3

将计算式中的数字进行合理的变形，可以得到：
0.41 × 25.5 + 0.035 × 255 + 2.4 × 2.55
= (0.4 + 0.01) × 25.5 + (0.03 + 0.005) × 255 + 2.4 × (1 + 1/2)
= 10.2 + 8.925 + 3 × 2.4
= 10.2 + 8.925 + 7.2
= 26.325
因此，0.41 × 25.5 + 0.035 × 255 + 2.4 × 2.55 的结果是 26.325。