四年级数学下册 整数加减简便运算专项练习

四年级数学下册 整数加减简便运算专项练习


简介:
(1)682-97 =682-(100-3) =682-100+3 =585 (2)423-275+377-325 =(423+377)-(275+325) =800-600 =200 (3)356+188 =356+(200-12) =356+200-12 =556-12 =544 (4)202-98 =202-(100-2) =202-100+2 =102+2 =104 (5)832-(432+56) =832-432-56 =400-56 =344