Question

112×99简便运算？

Answer 1

原式=112×(100-1)
=112×100-112
=11200-112
=11088

Answer 2

=112×（100-1）
=112×100-112
=11200-112
=11088

Answer 3

112*99＝112*（100-1）＝112*100-112*1＝11200-112＝11088