57×99简便计算

问题描述:

57×99简便计算

57×99
=57×(100-1)
=57×100-57
=5700-57
=5700-60+3
=5643

57x(100-1)=57X100-57=5700-57=5643

57x99
=57x(100-1)
=57x100-57x1
=5700-57
=5643

(60-3)X(100-1)=60X100-60-300-3=5643

57x(100-1)=57x100-57x1=5643

57x99=57x(100-1)=5700-57=5643

57*99
=57*(100-1)
=5700-57
=5643

57×(100-1)=57*100-57=5643乘法分配律

57x99
=57x100-57
=5700-57
=5643

57X(100-1)=
57X100-57X1=
5700-57=5643

57×99
=57×(100-1)
=57×100-57×1
=5700-57
=5643