各位学霸帮忙看看,这两道题怎么简便运算?谢谢
2016-04-14
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(4.6-3.2)*11.5
=1.4*11.5
=11.5+0.4*11.5
=11.5+4.6=16.1
9.76*0.72-0.76*0.72+0.72
=(9.76-0.76+1)*0.72
=10*0.72
=7.2
=1.4*11.5
=11.5+0.4*11.5
=11.5+4.6=16.1
9.76*0.72-0.76*0.72+0.72
=(9.76-0.76+1)*0.72
=10*0.72
=7.2
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9.76X0.72-0.76X0.72+0.72
=0.72X(9.76-0.76)+0.72
=0.72X9+0.72
=0.72X(9+1)
=0.72X10
=7.2
(4.6-3.2)x11.5
=1.4x11.5
=16.1
=0.72X(9.76-0.76)+0.72
=0.72X9+0.72
=0.72X(9+1)
=0.72X10
=7.2
(4.6-3.2)x11.5
=1.4x11.5
=16.1
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