A-A+
计算下列各题 能简算的要简算. (1)45+(38-14)(2)2-37-47(3)58-1
问题详情
计算下列各题,能简算的要简算.
参考答案
(1)45+(38-14),
=45+18,
=3740;
(2)2-37-47,
=2-(37+47),
=2-1,
=1;
(3)58-13+512,
=724+512,
=1724;
(4)29+917+79+817,
=(29+79)+(917+817),
=1+1,
=2;
(5)512-(12-112),
=512-12+112,
=512+112-12,
=12-12,
=0;
(6)45-(715-49),
=45-715+49,
=13+49,
=79.
考点: