题目内容
计算:
(1)﹣17+(﹣58)+(+5);
(2)
;
(3)
;
(4)
.
(1)﹣17+(﹣58)+(+5);
(2)
(3)
(4)
解:
(1)原式=﹣17﹣58+5
=﹣70;
(2)原式=
×24+
×24﹣
×24﹣
×
=16+20﹣14﹣3
=19;
(3)原式=16×8﹣8×
+8×8
=128﹣1+64
=191;
(4)原式=﹣9﹣[﹣
﹣(1﹣
×
)×9]
=﹣9﹣[﹣
﹣
×9]
=﹣9﹣(﹣
﹣6)
=﹣9+
+6
=﹣
.
(1)原式=﹣17﹣58+5
=﹣70;
(2)原式=
=16+20﹣14﹣3
=19;
(3)原式=16×8﹣8×
=128﹣1+64
=191;
(4)原式=﹣9﹣[﹣
=﹣9﹣[﹣
=﹣9﹣(﹣
=﹣9+
=﹣
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