
(1)(-15)-18÷(-3)+|-5|;(2)(-13)2÷133-12×(23-16);(3)8+(-2)3÷(-4)×(-7+5);
(1)(-15)-18÷(-3)+|-5|;(2)(-13)2÷133-12×(23-16);(3)8+(-2)3÷(-4)×(-7+5);(4)(12-3+56-712...
(1)(-15)-18÷(-3)+|-5|;(2)(-13)2÷133-12×(23-16);(3)8+(-2)3÷(-4)×(-7+5);(4)(12-3+56-712)÷(-7+5).
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(1)(-15)-18÷(-3)+|-5|
=-15+6+5
=-15+11
=-4;
(2)(-
)2÷
-12×(
-
)
=
×27-8+2
=3-8+2
=-3;
(3)8+(-2)3÷(-4)×(-7+5)
=8-8÷(-4)×(-2)
=8-4
=4;
(4)(
-3+
-
)÷(-7+5)
=(-
)÷(-2)
=
.
=-15+6+5
=-15+11
=-4;
(2)(-
1 |
3 |
1 |
33 |
2 |
3 |
1 |
6 |
=
1 |
9 |
=3-8+2
=-3;
(3)8+(-2)3÷(-4)×(-7+5)
=8-8÷(-4)×(-2)
=8-4
=4;
(4)(
1 |
2 |
5 |
6 |
7 |
12 |
=(-
9 |
4 |
=
9 |
8 |
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