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(1)2.75-216-334+123(2)[1.4-(-3.6+5.2)-4.3]-(-1.5)(3)(-81)÷214×(-49)÷(-16)(4)-48×(12-58+13-1116)(5)112×57-(-57×212+(-12÷125))(6)991718×(-9)

题目详情
(1)2.75-2
1
6
-3
3
4
+1
2
3
            
(2)[1.4-(-3.6+5.2)-4.3]-(-1.5)
(3)(-81)÷2
1
4
×(-
4
9
)÷(-16)
(4)-48×(
1
2
-
5
8
+
1
3
-
11
16

(5)1
1
2
×
5
7
-(-
5
7
×2
1
2
+(-
1
2
÷1
2
5
))       
(6)99
17
18
×(-9)
▼优质解答
答案和解析
(1)原式=2.75-3
3
4
-2
1
6
+1
2
3
=-1-
1
2
=-1
1
2

(2)原式=1.4+3.6-5.2-4.3+1.5=-3;
(3)原式=-81×
4
9
×
4
9
×
1
16
=-1;
(4)原式=-24+30-16+44=-40+74=34;
(5)原式=
5
7
×(1
1
2
+2
1
2
-
1
2
)=
5
7
×
7
2
=
5
2

(6)原式=(100-
1
18
)×(-9)=-900+
1
2
=-899
1
2