问题 解答题
用递等式计算.
244-6×28

480÷32-15

78+240÷4
54×(71-33)(227-57)÷34900÷(90÷2)
答案

(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.

单项选择题
填空题