题目内容
计算题:
(1)23﹣17﹣(﹣7)+(﹣16)
;
;
.
(1)23﹣17﹣(﹣7)+(﹣16)
解:(1)23﹣17﹣(﹣7)+(﹣16),
=23﹣17+7﹣16,
=23+7﹣17﹣16,
=30﹣33,
=﹣3;
,
=﹣5﹣3×
,
=﹣5﹣1,
=﹣6;
,
=5×
×7﹣12×
,
=(5+7﹣12)×
,
=0;
,
=1×
×
+1﹣0.8,
=1﹣0.8+0.024,
=0.224.
=23﹣17+7﹣16,
=23+7﹣17﹣16,
=30﹣33,
=﹣3;
=﹣5﹣3×
=﹣5﹣1,
=﹣6;
=5×
=(5+7﹣12)×
=0;
=1×
=1﹣0.8+0.024,
=0.224.
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