A-A+
计算下面各题 能简便计算的要简便计算. 1÷(1+58÷5)(12+16)×(13-14)1
问题详情
计算下面各题,能简便计算的要简便计算.
参考答案
(1)1÷(1+58÷5),
=1÷(1+18),
=1÷98,
=89;
(2)(12+16)×(13-14),
=23×112,
=118;
(3)1425×24+1425,
=1425×(24+1),
=1425×25,
=14;
(4)57×59+49÷75,
=57×59+49×57,
=57×(59+49),
=57×1,
=57;
(5)4-1021÷23-27,
=4-57-27,
=4-(57+27),
=4-1,
=3;
(6)98-27+78-57,
=(98+78)-(27+57),
=2-1,
=1.
考点: