
计算下列各题:(1)-7+12(2)-52-(-5)2(3)(-1)2009÷19×(-3)(4)(-24)×(18?13+14)+(-2
计算下列各题:(1)-7+12(2)-52-(-5)2(3)(-1)2009÷19×(-3)(4)(-24)×(18?13+14)+(-22)....
计算下列各题:(1)-7+12(2)-52-(-5)2(3)(-1)2009÷19×(-3)(4)(-24)×(18?13+14)+(-22).
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(1)-7+12=5;
(2)-52-(-5)2
=-25-25
=-50;
(3)(-1)2009÷
×(-3)
=-1×9×(-3)
=27;
(4)(-24)×(
?
+
)+(?22)
=-24×(
-
+
)+(-4)
=-3+8-6-4
=-5.
(2)-52-(-5)2
=-25-25
=-50;
(3)(-1)2009÷
1 |
9 |
=-1×9×(-3)
=27;
(4)(-24)×(
1 |
8 |
1 |
3 |
1 |
4 |
=-24×(
3 |
24 |
8 |
24 |
6 |
24 |
=-3+8-6-4
=-5.
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