123乘以103 简便方法怎么计算

Question

123乘以103 简便方法怎么计算

Answer 1

方法一
123X103=123X（100+3）
=123X100+123X3
=12300+369
=12669
方法二
123X103=(113+10)X(113-10)
=113^2-10^2
=(100+13)^2-100
=100^2+3X13X100+13^2-100
=10000+2600+169-100
=12600+69
=12669

Answer 2

123×103
=123×(100+3)
=12300+369
=12669本回答被提问者采纳

Answer 3

123*103
=(100+3)*123
=100*123+3*123
=12300+369
=12669

Answer 4

123乘100得12300加123乘3得369总得12669

Answer 5

100*100+23*100+123*3