
计算:(1)-17+23+(-16)-(-7)(2)1?42÷5×(?15)(3)(?3)2?[(?23)+(?14)]÷12(4)?14÷(?5)2×(?
计算:(1)-17+23+(-16)-(-7)(2)1?42÷5×(?15)(3)(?3)2?[(?23)+(?14)]÷12(4)?14÷(?5)2×(?53)+|0....
计算:(1)-17+23+(-16)-(-7)(2)1?42÷5×(?15)(3)(?3)2?[(?23)+(?14)]÷12(4)?14÷(?5)2×(?53)+|0.8?1|.
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(1)原式=[(-17)+(-16)]+(23+7)
=-33+30
=-3;
(2)原式=1-16×
×(-
)
=1+
=
;
(3)原式=9-(-
)×2
=9+
=10
;
(4)原式=-1÷25×(-
)+0.2
=
+
=
.
=-33+30
=-3;
(2)原式=1-16×
1 |
5 |
1 |
5 |
=1+
16 |
25 |
=
41 |
25 |
(3)原式=9-(-
11 |
12 |
=9+
11 |
6 |
=10
1 |
6 |
(4)原式=-1÷25×(-
5 |
3 |
=
1 |
15 |
1 |
5 |
=
4 |
15 |
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