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计算下列各题(1)9+(-10)+(-2)-(-3)(2)1+(-2)+|-2-3|-5(3)4−(−2)÷13×(−3)(4)−23÷49×(−23)2+(−0.8)−5×(−122)(5)(512+23−34)×(−12)(6)(-79)÷214+49×(-29)

题目详情
计算下列各题
(1)9+(-10)+(-2)-(-3)
(2)1+(-2)+|-2-3|-5
(3)4−(−2)÷
1
3
×(−3)
(4)2
4
9
×(−
2
3
)2+(−0.8)−5×(−
1
22
)
(5)(
5
12
+
2
3
3
4
)×(−12)
(6)(-79)÷2
1
4
+
4
9
×(-29)
▼优质解答
答案和解析
(1)原式=9-10-2+3
=0;

(2)原式=1-2+5-5
=-1;

(3)原式=4-(-2)×3×(-3)
=4-18
=-14;

(4)原式=-8×
9
4
×
4
9
-0.8-5×(-
1
4

=-8-0.8+1.25
=-7.55;

(5)原式=-(
5
12
×12+
2
3
×12−
3
4
×12)
=-5-8+9
=-4;

(6)原式=-79×
4
9
+
4
9
×(-29)
=
4
9
×(-79-29)
=
4
9
×(-108)
=-48.