四年级下册数学•简便计算练习题

四年级下册数学•简便计算练习题


简介:
(1)137×49-37×49 =(137-37)×49 =100×49 =4900 (2)328-175-25 =328-(175+25) =328-200 =128 (3)36×25 =9×(4×25) =9×100 =900 (4)101×54 =(100+1)×54 =100×54+54 =5400+54 =5454