Question

123×42+58×63+58×60的简便计算？

Answer 1

123×42+58×63+58×60

【前两项提取7】
=7x(123x6+58x9)+3480
=7x(738+522)+3480
=7x1260+3480
=8820+3480
=12300

Answer 2

123×42+58×63+58×60
=123×42+58×(63+60)
=123×42+58×123
=123x(42+58)
=123x100
=12300