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

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