Question

计算下面各题，能简便的要用简便方法计算．[0.5+（2-0.75）]×1.6 10.73-4.76-5.24 17

计算下面各题，能简便的要用简便方法计算．[0.5+（2-0.75）]×1.6 10.73-4.76-5.24 17.4×2.43-1.43×7.4 2.2+（4.72-2.8）÷0.4．

Answer 1

（1）[0.5+（森慎2-0.75）]×1.6
=[0.5+1.25]×1.6
=1.75×1.6
=2.8

（2）10.73-4.76-5.24
=10.73-（4.76+5.24）
=10.73-10
=0.73

（3）17.4×2.43-1.43×7.4
=（10+7.4）×2.43-1.43×7.4
=10×2.43+7.4×2.43-1.43×7.4
=24.3+7.4×（2.43-1.43）
=24.3+7.4
=31.7

（4）塌春颂2.2+（团郑4.72-2.8）÷0.4
=2.2+1.92÷0.4
=2.2+4.8
=7