Question

123×76+123×25-123用简便方法计算？

Answer 1

123X76+123X25-123
=123X76+123X25-123X1
=123X(76+25-1)
=123X100
=12300

Answer 2

123×（76+25-1）
=123×100
=12300

Answer 3

简便运算
123×76+123×25-123
=123×76+123×25-123×1
=123×（76+25-1）
=123×100
=12300