题目内容

计算 
(1)-4-28-(-29)+(-24);
(2)4×(-3)2-5×(-2)+6;
(3)(
1
6
-
5
7
+
2
3
)×(-42)

(4)-14-
1
6
×[3-(-3)2]
(1)原式=-4-28+29-24
=-4-28-24+29
=--56+29
=-27;

(2)原式=4×9+5×2+6
=36+10+6
=52;

(3)原式=-
1
6
×42+
5
7
×42-
2
3
×42
=-7+30-28
=-5;

(4)原式=-1-
1
6
(3-9)
=-1+1
=0.
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