题目内容
计算:
(1)26﹣17+(﹣5)﹣33;
(2)
;
(3)
;
(4)
。
(1)26﹣17+(﹣5)﹣33;
(2)
(3)
(4)
解:(1)26﹣17+(﹣5)﹣33
=26+(﹣17)+(﹣5)+(﹣33)
=26+[(﹣17)+(﹣5)+(﹣33)]
=26+(﹣55)
=﹣29;
(2)
=
=
=
;
(3)
=
=
=18﹣1
=17;
(4)
=
=
=6+(﹣5)
=1。
=26+(﹣17)+(﹣5)+(﹣33)
=26+[(﹣17)+(﹣5)+(﹣33)]
=26+(﹣55)
=﹣29;
(2)
=
=
=
(3)
=
=
=18﹣1
=17;
(4)
=
=
=6+(﹣5)
=1。
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