2018年五年级数学及答案:简便运算(2)
网络资源
2018-08-10 13:20:13
答案与解析:
657-(269+357)+169 =657-(357+269)+169 =657-357-269+169 =300-(100+169)+169 =300-100-169+169 =200-169+169 =200
答案与解析:
657-(269+357)+169 =657-(357+269)+169 =657-357-269+169 =300-(100+169)+169 =300-100-169+169 =200-169+169 =200