Question

46*58+27*58+73*42简便运算？

Answer 1

简便运算是先算前两项,提取公约数58得
58x(46+27)+73x42
=58x73+73x42 再提取公约数73得
= 73x(58+42)
=73x100
=7300

Answer 2

46*58+27*58+73*42 两次利用乘法交换律，具体过程如下：
46*58+27*58+73*42
=（46+27）x 58 + 73 x 42
=73 x 58 + 73 x 42
=73 x (58+42)
=73 x 100
=7300