240+(568-36×13)
82×3+3×18×4
45+240÷4×40
46×(18+282)-3800
解:
(1)240+(568-36×13),
=240+(568-468),
=240+100,
=340;
(2)82×3+3×18×4,
=246+216,
=462;
(3)45+240÷4×40,
=45+60×40,
=45+2400,
=2445;
(4)46×(18+282)-3800,
=46×300-3800,
=13800-3800,
=10000.
分析:(1)先算減法,再算乘法,最后算加法;
(2)先算乘法,再算加法;
(3)先算除法,再算乘法,最后算加法;
(4)先算加法,再算乘法,最后算減法.
點評:此題主要考查整數的四則混合運算的運算順序,然后根據運算順序進行計算.