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4.7*3.8-14.56
=(4+0.7)*(3+0.8)-14.56
=12+3.2+2.1+0.56-14.56
=12+3.2+2.1-14
=3.2+2.1-2
=3.2+.1
=3.3
=(4+0.7)*(3+0.8)-14.56
=12+3.2+2.1+0.56-14.56
=12+3.2+2.1-14
=3.2+2.1-2
=3.2+.1
=3.3
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2018-01-02
展开全部
4.7×3.8-14.56
=4.7×4-4.7×0.2-14.56
=18.8-0.94-14.56
=18.8-(0.94+14.56)
=18.8-15.5
=3.3
=4.7×4-4.7×0.2-14.56
=18.8-0.94-14.56
=18.8-(0.94+14.56)
=18.8-15.5
=3.3
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