题目内容
计算:
(1)61+6+13;
(2)
;
(3)
;
(4)
÷
.
(1)61+6+13;
(2)
(3)
(4)
解:(1)61+6+13=80;
(2)
=﹣27×
×
=﹣27;
(3)
=﹣4+3﹣2
=﹣3;
(4)
÷
=﹣1×[﹣9×
﹣2]×(
)
=﹣9.
(2)
=﹣27×
=﹣27;
(3)
=﹣4+3﹣2
=﹣3;
(4)
=﹣1×[﹣9×
=﹣9.
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