问题 解答题
求下列各式的值(后两小题用计算器计算,结果精确到0.01):
(1)-
144
;(2)-
(-8)2
;(3)
1
7
9
;(4)
316×20×25
;(5)
7.628
;(6)
357.6
+
3-4.96
答案

(1)-

144
=-12;

(2)-

(-8)2
=-
64
=-8;

(3)

1
7
9
=
16
9
=
4
3

(4)

316×20×25
=
38000
=
3203
=20;

(5)

7.628
≈2.762;

(6)

357.6
+
3-4.96
≈3.862-1.705=2.157.

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