计算下列各题:(1)3×(?2)?(?1)÷13×(?3)(2)-7×(?227)+26×(?227)+2×227(3)?13?(1?0.5)×13×[2
计算下列各题:(1)3×(?2)?(?1)÷13×(?3)(2)-7×(?227)+26×(?227)+2×227(3)?13?(1?0.5)×13×[2?(?3)2](...
计算下列各题:(1)3×(?2)?(?1)÷13×(?3)(2)-7×(?227)+26×(?227)+2×227(3)?13?(1?0.5)×13×[2?(?3)2](4)(?2)2?(3?5)?4+2×(?3).
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(1)原式=-6+1×3×(-3)
=-6-9
=-15;
(2)原式=-
×(-7+26-2)
=-
×(-21)
=-66;
(3)原式=-1-
×
×(2-9)
=-1+
=
;
(4)原式=4-(-2)-2-6
=-2.
=-6-9
=-15;
(2)原式=-
| 22 |
| 7 |
=-
| 22 |
| 7 |
=-66;
(3)原式=-1-
| 1 |
| 2 |
| 1 |
| 3 |
=-1+
| 7 |
| 6 |
=
| 1 |
| 6 |
(4)原式=4-(-2)-2-6
=-2.
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