用递等式计算.244-6×28 480÷32-15 78+240÷4 54×(71-33) (227-57)÷34 900÷(90÷2

2025-04-07 16:26:55
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回答1:

(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.