计算(1)(-12)-(-15)+(-8)-(-10)(2)(16+136?14+112)×(?48)(3)-7-4×(-3)+12÷(-4)(4
计算(1)(-12)-(-15)+(-8)-(-10)(2)(16+136?14+112)×(?48)(3)-7-4×(-3)+12÷(-4)(4)(?3)2?(?5)3...
计算(1)(-12)-(-15)+(-8)-(-10)(2)(16+136?14+112)×(?48)(3)-7-4×(-3)+12÷(-4)(4)(?3)2?(?5)3×(?25)2?16÷|?2|.
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(1)(-12)-(-15)+(-8)-(-10)
=(-12)+15+(-8)+10
=-20+25
=5;
(2)(
+
-
+
)×(-48)
=
×(-48)+
×(-48)-
×(-48)+
×(-48)
=-8+(-
)+12+(-4)
=12+(-13
)
=-1
;
(3)-7-4×(-3)+12÷(-4)
=-7+12+(-3)
=-10+12
=2;
(4)(-3)2-(-5)3×(-
)2-16÷|-2|
=9-(-125)×
-16÷2
=9+20-8
=21.
=(-12)+15+(-8)+10
=-20+25
=5;
(2)(
1 |
6 |
1 |
36 |
1 |
4 |
1 |
12 |
=
1 |
6 |
1 |
36 |
1 |
4 |
1 |
12 |
=-8+(-
4 |
3 |
=12+(-13
1 |
3 |
=-1
1 |
3 |
(3)-7-4×(-3)+12÷(-4)
=-7+12+(-3)
=-10+12
=2;
(4)(-3)2-(-5)3×(-
2 |
5 |
=9-(-125)×
4 |
25 |
=9+20-8
=21.
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