
计算:(1)12-(-18)+(-7)-15(2)(-2)×3+(-24)÷3(3)|?79|÷(23?15)?13×(?4)2(4)(-1)10
计算:(1)12-(-18)+(-7)-15(2)(-2)×3+(-24)÷3(3)|?79|÷(23?15)?13×(?4)2(4)(-1)100×5+(-2)4÷4(...
计算:(1)12-(-18)+(-7)-15(2)(-2)×3+(-24)÷3(3)|?79|÷(23?15)?13×(?4)2(4)(-1)100×5+(-2)4÷4(5)-23÷49×(-23)2(6)-14-16×[2-(-3)2].
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(1)原式=12+18-7-15
=8;
(2)原式=-6-8
=-14;
(3)原式=
÷
-
×16
=
×
-
=
-
=-
;
(4)原式=1×5+16÷4
=5+4
=9;
(5)原式=-8×
×
=-8;
(6)原式=-1-
×(2-9)
=-1+
=
.
=8;
(2)原式=-6-8
=-14;
(3)原式=
7 |
9 |
7 |
15 |
1 |
3 |
=
7 |
9 |
15 |
7 |
16 |
3 |
=
5 |
3 |
16 |
3 |
=-
11 |
3 |
(4)原式=1×5+16÷4
=5+4
=9;
(5)原式=-8×
9 |
4 |
4 |
9 |
=-8;
(6)原式=-1-
1 |
6 |
=-1+
7 |
6 |
=
1 |
6 |
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