如题所述
27X53
=27X(50+3)
=27X50+27X3
=1350+81
=1431
27x22å75x78
=27X(22+78)
=27X100
=2700
=27X(50+3)
=27X50+27X3
=1350+81
=1431
27x22å75x78
=27X(22+78)
=27X100
=2700
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第1个回答 2015-03-04
27x53 27x22十75x78=7500