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计算题(1)-14-16×[2-(-3)2].(2)-13×23-0.34×27+13×(-13)-57×0.
计算题(1)-14-16×[2-(-3)2].(2)-13×23-0.34×27+13×(-13)-57×0.34....
计算题(1)-14-16×[2-(-3)2].(2)-13×23-0.34×27+13×(-13)-57×0.34.
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(1)-14-
×[2-(-3)2],
=-1-
×[2-9],
=-1-
×[-7],
=-1+
,
=
.
(2)-13×
-0.34×
+
×(-13)-
×0.34,
=-13×(
+
)-0.34×(
+
),
=-13×1-0.34×1,
=-13-0.34,
=-13.34.
1 |
6 |
=-1-
1 |
6 |
=-1-
1 |
6 |
=-1+
7 |
6 |
=
1 |
6 |
(2)-13×
2 |
3 |
2 |
7 |
1 |
3 |
5 |
7 |
=-13×(
2 |
3 |
1 |
3 |
2 |
7 |
5 |
7 |
=-13×1-0.34×1,
=-13-0.34,
=-13.34.
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