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(1)375+137÷(69+68)(2)2.5+28.6+0.73(3)5.06-(3.14+0.4)(4)4900-20+15×17.

题目详情
(1)375+137÷(69+68) (2)2.5+28.6+0.73 (3)5.06-(3.14+0.4) (4)4900-20+15×17.
▼优质解答
答案和解析
(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.