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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
-3
+1
(2)[1.4-(-3.6+5.2)-4.3]-(-1.5)
(3)(-81)÷2
×(-
)÷(-16)
(4)-48×(
-
+
-
)
(5)1
×
-(-
×2
+(-
÷1
))
(6)99
×(-9)
1 |
6 |
3 |
4 |
2 |
3 |
(2)[1.4-(-3.6+5.2)-4.3]-(-1.5)
(3)(-81)÷2
1 |
4 |
4 |
9 |
(4)-48×(
1 |
2 |
5 |
8 |
1 |
3 |
11 |
16 |
(5)1
1 |
2 |
5 |
7 |
5 |
7 |
1 |
2 |
1 |
2 |
2 |
5 |
(6)99
17 |
18 |
▼优质解答
答案和解析
(1)原式=2.75-3
-2
+1
=-1-
=-1
;
(2)原式=1.4+3.6-5.2-4.3+1.5=-3;
(3)原式=-81×
×
×
=-1;
(4)原式=-24+30-16+44=-40+74=34;
(5)原式=
×(1
+2
-
)=
×
=
;
(6)原式=(100-
)×(-9)=-900+
=-899
.
3 |
4 |
1 |
6 |
2 |
3 |
1 |
2 |
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 |
(4)原式=-24+30-16+44=-40+74=34;
(5)原式=
5 |
7 |
1 |
2 |
1 |
2 |
1 |
2 |
5 |
7 |
7 |
2 |
5 |
2 |
(6)原式=(100-
1 |
18 |
1 |
2 |
1 |
2 |
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