用简便方法怎样计算 (25*17+25*19)*4




(25*17+25*19)*4
=25*4*17+25*4*19
=100*17+100*19
=1700+1900
=3600
利用乘法圆凳分配率和橘槐旅明兆25*4=100的巧算知识
(25*17+25*19)*4
=(17+19)*(25*4)
=36*100
=3600


25×4×17+25×4×19=3600
25*(17+19)*4=360