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计算下列各题:(1)-20+(-14)-(-18)-15(2)76×(16-13)×314÷35(3)(12-23+34)÷112+(-2)2-(-3)3
计算下列各题:(1)-20+(-14)-(-18)-15(2)76×(16-13)×314÷35(3)(12-23+34)÷112+(-2)2-(-3)3....
计算下列各题:(1)-20+(-14)-(-18)-15(2)76×(16-13)×314÷35(3)(12-23+34)÷112+(-2)2-(-3)3.
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(1))-20+(-14)-(-18)-15
=-20-14+18-15
=-49+18
=-31;
(2)
×(
-
)×
÷
=
×(-
)×
×
=-
;
(3)(
-
+
)÷
+(-2)2-(-3)3
=(
-
+
)×12+4+27
=(
-
+
)×12+31
=
×12-
×12+
×12+31
=6-8+9+31
=46-8
=38.
=-20-14+18-15
=-49+18
=-31;
(2)
7 |
6 |
1 |
6 |
1 |
3 |
3 |
14 |
3 |
5 |
=
7 |
6 |
1 |
6 |
3 |
14 |
5 |
3 |
=-
5 |
72 |
(3)(
1 |
2 |
2 |
3 |
3 |
4 |
1 |
12 |
=(
1 |
2 |
2 |
3 |
3 |
4 |
=(
1 |
2 |
2 |
3 |
3 |
4 |
=
1 |
2 |
2 |
3 |
3 |
4 |
=6-8+9+31
=46-8
=38.
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