问题 解答题
512-112÷4105÷7×18520÷(45÷9)(603-246)÷7.
答案

(1)512-112÷4,

=512-28,

=484;

(2)105÷7×18,

=15×18,

=270;

(3)520÷(45÷9),

=520÷5,

=104;

(4)(603-246)÷7,

=357÷7,

=51.

填空题
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