题目内容
用递等式计算.
344-6×28(227-57)÷3478+240÷4.
344-6×28(227-57)÷3478+240÷4.
(1)344-6×28,
=344-168,
=176;
(2)(227-57)÷34,
=170÷34,
=5;
(3)78+240÷4,
=78+60,
=138.
=344-168,
=176;
(2)(227-57)÷34,
=170÷34,
=5;
(3)78+240÷4,
=78+60,
=138.
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