四年级数学简便运算题

Question

99+83+99（怎样用简便方法计算？）
不好意思打错了
问题：99*83+99的简便方法

Answer 1

(100-1)*83+（100-1）
=100*83-83+100-1
=8300-83+100-1
=8217+100-1
=8317-1
=8316

Answer 2

99*83+99
=100*83-83+99
=8300-83+99
=8300+16
=8316

Answer 3

=99*84
=（100-1）*84

Answer 4

99*83+99
=99*（83+1）=99*84=（100-1）*84=8400-84=8316

Answer 5

99+83+99
=99(1+81+1)+99
=（99+1）+81+（1+99）
=100+81+100
=281

Answer 6

(100-1)+83