下面各题,你能用简便方法计算吗?1.0.76x9.9+0.076 2.11.72-(4.3x0.4+5.6) 3.12.5x(8+0.8-0.047)

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下面各题,你能用简便方法计算吗?1.0.76x9.9+0.0762.11.72-(4.3x0.4+5.6)3.12.5x(8+0.8-0.047)下面各题,你能用简便方法计算吗?1.0.76x9.9+

下面各题,你能用简便方法计算吗?1.0.76x9.9+0.076 2.11.72-(4.3x0.4+5.6) 3.12.5x(8+0.8-0.047)
下面各题,你能用简便方法计算吗?1.0.76x9.9+0.076 2.11.72-(4.3x0.4+5.6) 3.12.5x(8+0.8-0.047)

下面各题,你能用简便方法计算吗?1.0.76x9.9+0.076 2.11.72-(4.3x0.4+5.6) 3.12.5x(8+0.8-0.047)
1.0.76x9.9+0.076
=0.076*99+0.076
=(99+1)*0.076
=100*0.076
=7.6
2.11.72-(4.3x0.4+5.6)
=10+1.72-1.72+5.6
=15.6
3.12.5x(8+0.8-0.047)
=12.5*8+12.5*0.8-12.5*0.04-12.5*0.007
=100+10-0.5-0.0875
=109.4125