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计算:(1)?14?(?56)+23+(?12).(2)(?12557)÷(?5).(3)[1?(1?0.5×13)]×[2?(?3)2].(4)-62-(3-
计算:(1)?14?(?56)+23+(?12).(2)(?12557)÷(?5).(3)[1?(1?0.5×13)]×[2?(?3)2].(4)-62-(3-7)2-2...
计算:(1)?14?(?56)+23+(?12).(2)(?12557)÷(?5).(3)[1?(1?0.5×13)]×[2?(?3)2].(4)-62-(3-7)2-2×(-1)3-|-2|.
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(1)原式=-
+
+
-
=-
-
+
+
=-
+
=
;
(2)原式=(-125-
)÷(-5)
=125÷5+
÷5
=25+
=25
;
(3)原式=[1-(1-
)]×(2-9)
=
×(-7)
=-
;
(4)原式=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52.
1 |
4 |
5 |
6 |
2 |
3 |
1 |
2 |
=-
1 |
4 |
1 |
2 |
5 |
6 |
2 |
3 |
=-
3 |
4 |
3 |
2 |
=
3 |
4 |
(2)原式=(-125-
5 |
7 |
=125÷5+
5 |
7 |
=25+
1 |
7 |
=25
1 |
7 |
(3)原式=[1-(1-
1 |
6 |
=
1 |
6 |
=-
7 |
6 |
(4)原式=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52.
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