1.6×1.25
=0.8×1.25×2
=1×2
2
4.3×6.7+3.3×4.3是4.3 吧
=4.3×（6.7+3.3）
=4.3×10
=4.3
1.25×3.69×8
=10×3.69
=36.9
32.4÷2.5÷0.4
=32.5÷（2.5×0.4）
=32.5÷1
=32.5是4.13，我写错了，呵呵，对不起哈！还是4.13？？？对啊都是4.134.13×6.7+3.3×4.13 =4.13×（6.7+3.3）=4.13×10=41.3