答:57×63-57+38×57
=57×63-57×1+57×38
=57×(63–1+38)
=57×(62+38)
=57×100
=5700
简便方法计算的结果是5700
观察算式都有公因数57,利用乘法分配律进行计算。原式=57×(63-1+38)=57×100=5700
(63一1十38)X57=5700
57x(63十38一1)57X1005700