Question

用简便算法34.5x0.03+3.45x8.3+0.345x142.5x7.6+0.25x11+2？

Answer 1

简便算法
34.5x0.03+3.45x8.3+0.345x142.5x7.6+0.25x11+2
=3.45×10×0.03+3.45×8.3+3.45×14.25×7.6+0.25×11+2
=3.45×（0.3+8.3+108.3）+2.75+2
=3.45×116.9+2.75+2
=403.305+2.75+2
=408.055

Answer 2

原式=3.45×0.3+3.45×8.3+3.45×14.25×7.6+0.25×11+2
=3.45×(0.3+8.3+14.25×7.6)+0.25×11+2
=3.45×(0.3+8.3+108.3)+2.75+2
=3.45×116.9+4.75
=403.305+4.75
=408.055