问题 解答题

计算下面各题.

(460-220)÷60

13×(28+16)

75+240÷(20-5)

(90+360)÷(20-5)

答案

(1)(460-220)÷60,

=240÷60,

=4;

(2)13×(28+16),

=13×44,

=572;

(3)75+240÷(20-5)

=75+240÷15,

=75+16,

=91;

(4)(90+360)÷(20-5),

=450÷15

=30.

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