81/100×99简便运算

日期:2022-02-09 03:25:08 人气:1

81/100×99简便运算

解:81/100X99
=81/100X(100一1)
=81/100X100一81/100X1
=81一81/100
=80又100/100一81/100
=80又19/100
    A+
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