44/45*99简便运算
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44/45*99简便运算
44/45*99简便运算
44/45*99简便运算
44/45*99
=(1-1/45)x99
=1x99-1/45x99
=99-11/5
=96又4/5
44/45*(90+9)
=44/45*90+44/45*9
=88+44/5
=88+8又4/5
=96又4/5