问题
解答题
|
答案
(1)375+137÷(69+68),
=375+137÷137,
=375+1,
=376;
(2)2.5+28.6+0.73,
=31.1+0.73,
=31.83;
(3)5.06-(3.14+0.4),
=5.06-3.54,
=1.52;
(4)4900-20+15×17,
=4900-20+255,
=4880+255,
=5135.
|
(1)375+137÷(69+68),
=375+137÷137,
=375+1,
=376;
(2)2.5+28.6+0.73,
=31.1+0.73,
=31.83;
(3)5.06-(3.14+0.4),
=5.06-3.54,
=1.52;
(4)4900-20+15×17,
=4900-20+255,
=4880+255,
=5135.