问题 解答题
用递等式计算.
50+60×37578-(78+98)(422+28)÷(375-345)570÷5÷2.
答案

(1)50+60×37,

=50+2220,

=2270;

(2)578-(78+98),

=578-78-98,

=500-98,

=402;

(3)(422+28)÷(375-345),

=450÷30,

=15;

(4)570÷5÷2,

=570÷(5×2),

=570÷10,

=57.

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