题目内容
| 用递等式计算. 244-6×28 | 480÷32-15 | 78+240÷4 |
| 54×(71-33) | (227-57)÷34 | 900÷(90÷2) |
(1)244-6×28,
=244-168,
=76;
(2)480÷32-15,
=15-15,
=0;
(3)78+240÷4,
=78+60,
=138;
(4)54×(71-33),
=54×38,
=2052;
(5)(227-57)÷34,
=170÷34,
=5;
(6)900÷(90÷2),
=900÷45,
=20.
=244-168,
=76;
(2)480÷32-15,
=15-15,
=0;
(3)78+240÷4,
=78+60,
=138;
(4)54×(71-33),
=54×38,
=2052;
(5)(227-57)÷34,
=170÷34,
=5;
(6)900÷(90÷2),
=900÷45,
=20.
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