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说出下列各题的运算顺序,再用递等式计算.(1)155-(4992÷24-86)(2)[423+(56-32)×8]÷15(3)6400÷[800-(560+80)](4)3205-4824÷(301-277)(5)[2112-(79+101)]÷23(6)864÷[(2200-1464)÷23].
题目详情
说出下列各题的运算顺序,再用递等式计算.
(1)155-(4992÷24-86)
(2)[423+(56-32)×8]÷15
(3)6400÷[800-(560+80)]
(4)3205-4824÷(301-277)
(5)[2112-(79+101)]÷23
(6)864÷[(2200-1464)÷23].
(1)155-(4992÷24-86)
(2)[423+(56-32)×8]÷15
(3)6400÷[800-(560+80)]
(4)3205-4824÷(301-277)
(5)[2112-(79+101)]÷23
(6)864÷[(2200-1464)÷23].
▼优质解答
答案和解析
(1)155-(4992÷24-86),
=155-(208-86),
=155-122,
=33;
(2)[423+(56-32)×8]÷15,
=(423+24×8)÷15,
=(423+192)÷15,
=615÷15,
=41;
(3)6400÷[800-(560+80)],
=6400÷(800-640),
=6400÷160,
=40;
(4)3205-4824÷(301-277),
=3205-4824÷24,
=3205-201,
=3004;
(5)[2112-(79+101)]÷23,
=(2112-180)÷23,
=1932÷23,
=84;
(6)864÷[(2200-1464)÷23],
=864÷(736÷23),
=864÷32,
=27.
=155-(208-86),
=155-122,
=33;
(2)[423+(56-32)×8]÷15,
=(423+24×8)÷15,
=(423+192)÷15,
=615÷15,
=41;
(3)6400÷[800-(560+80)],
=6400÷(800-640),
=6400÷160,
=40;
(4)3205-4824÷(301-277),
=3205-4824÷24,
=3205-201,
=3004;
(5)[2112-(79+101)]÷23,
=(2112-180)÷23,
=1932÷23,
=84;
(6)864÷[(2200-1464)÷23],
=864÷(736÷23),
=864÷32,
=27.
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