2358+9987025-(427+63×26)5927-(458+627)58×32-2856÷283752-6986200-1026÷18×36.
网友回答
解:(1)2358+998,
=2358+1000-2,
=3358-2,
=3356;
(2)7025-(427+63×26),
=7025-(427+1638),
=7025-2065,
=4960;
(3)5927-(458+627),
=5927-627-458,
=5300-458,
=4842;
(4)58×32-2856÷28,
=1856-102,
=1754;
(5)3752-698,
=3752-700+2,
=3052+2,
=3054;
(6)6200-1026÷18×36,
=6200-57×36,
=6200-2052,
=4148.
解析分析:(1)(5)运用凑整法简算;
(2)先算小括号里面的乘法,再算小括号里面的加法,最后算括号外的减法;
(3)根据减法的性质简算;
(4)先同时运算乘法和除法,最后算减法;
(6)先算除法,再算乘法,最后算减法.
点评:1、如果是同一级运算,一般按从左往右依次进行计算;2、如果既有加减、又有乘除法,先算乘除法、再算加减;3、如果有括号,先算括号里面的;4、如果符合运算定律,可以利用运算定律进行简算.