题目内容
864÷[(27-23)×12]
450-150÷30+270.
450-150÷30+270.
(1)864÷[(27-23)×12]
=864÷[4×12]
=864÷48
=18;
(2)450-150÷30+270
=450-5+270
=445+270
=715.
=864÷[4×12]
=864÷48
=18;
(2)450-150÷30+270
=450-5+270
=445+270
=715.
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