题目内容
计算:
(1)﹣16+23+(﹣17)﹣(﹣7)
(2)﹣
﹣(﹣
)+(﹣
)﹣
(3)
×(﹣2
)﹣
×(﹣1
)﹣0.5÷2×
(4)[2
﹣(
)×36]÷5.
(1)﹣16+23+(﹣17)﹣(﹣7)
(2)﹣
(3)
(4)[2
解:(1)原式=﹣16+23﹣17+7
=7﹣17+7
=﹣3;
(2)原式=﹣
+
﹣
﹣
=﹣
+
﹣
﹣
=
﹣
﹣
=
﹣
﹣
=﹣
﹣
=﹣
﹣
=﹣
=﹣
;
(3)原式=
×(﹣
)﹣
×(﹣
)﹣
×
×
=
×(﹣
)+
﹣
=﹣
+
﹣
=
﹣
=
﹣
=﹣
;
(4)原式=[2
﹣(28﹣33+6)]÷5
=(2
﹣1)×
=
×
=
.
=7﹣17+7
=﹣3;
(2)原式=﹣
=﹣
=
=
=﹣
=﹣
=﹣
(3)原式=
=
=﹣
=
=
=﹣
(4)原式=[2
=(2
=
=
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