怎样简便怎样算 19.8*25.6+10.2*25.6 297*4.8 46.3+5.38*5.6-0.056 3.2*5.8/0.16
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19.8*25.6+10.2*25.6
=25.6*(19.8+10.2)
=25.6*30
=768
297*4.8
=(300-3)*4.8
=300*4.8-3*4.8
=1440-14.4
=1425.6
46.3+5.38*5.6-0.056
=46.3+5.6*(5.38-100)
=46.3+5.6*-94.62
=-200.9
3.2*5.8/0.16
=3.2*58/1.6
=2*58
=116
=25.6*(19.8+10.2)
=25.6*30
=768
297*4.8
=(300-3)*4.8
=300*4.8-3*4.8
=1440-14.4
=1425.6
46.3+5.38*5.6-0.056
=46.3+5.6*(5.38-100)
=46.3+5.6*-94.62
=-200.9
3.2*5.8/0.16
=3.2*58/1.6
=2*58
=116
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