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计算:(1)(-30)-(-28)+(-70)-88(2)-[3.5-(-1.13)-(-0.33)]+2.5(3)(-1114)×(-113)×(-0.3)×313×(-35)(4)1-125×[2-(-3)]2(5)(1-112-38+712)×(-24)(6)-23÷49×(-23)2+(-0.8)-5×(-122

题目详情
计算:
(1)(-30)-(-28)+(-70)-88      
(2)-[3.5-(-1.13)-(-0.33)]+2.5
(3)(-11
1
4
)×(-1
1
3
)×(-0.3)×3
1
3
×(-
3
5

(4)1-
1
25
×[2-(-3)]2
(5)(1-1
1
2
-
3
8
+
7
12
)×(-24)
(6)-2
4
9
×(-
2
3
)2+(-0.8)-5×(-
1
22
).
▼优质解答
答案和解析
(1)原式=-30+28-70-88
=-100-60
=-160;

(2)原式=-[3.5+1.13+0.33]+2.5
=-4.96+2.5
=-2.46;

(3)原式=
45
4
×
4
3
×
3
10
×
10
3
×
3
5

=9;

(4)原式=1-
1
25
×(2+3)2
=1-
1
25
×25
=1-1
=0;

(5)原式=1×(-24)-
3
2
×(-24)-
3
8
×(-24)+
7
12
×(-24)
=-24+36+9-14
=7;

(6)原式=-8×
9
4
×
4
9
-
4
5
-5×(-
1
4

=-8-
4
5
+
5
4

=-7
11
20