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用递等式计算.(能简单的,要用简便算)(1)600-480÷12(2)6.7-1.75+1.8(3)1-815×1516(4)9×715-415÷19(5)(80-9.8)×0.6-2.12(6)(1-511)×(112+38)(7)145×[(21

题目详情
用递等式计算.(能简单的,要用简便算)
(1)600-480÷12      
(2)6.7-1.75+1.8      
(3)1-
8
15
×
15
16

(4)9×
7
15
-
4
15
÷
1
9
                   
(5)(80-9.8)×0.6-2.12
(6)(1-
5
11
)×(
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].



8
15
×
15
16

(4)9×
7
15
-
4
15
÷
1
9
                   
(5)(80-9.8)×0.6-2.12
(6)(1-
5
11
)×(
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
8
15
881515
15
16

(4)9×
7
15
-
4
15
÷
1
9
                   
(5)(80-9.8)×0.6-2.12
(6)(1-
5
11
)×(
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
15
16
15151616
7
15
-
4
15
÷
1
9
                   
(5)(80-9.8)×0.6-2.12
(6)(1-
5
11
)×(
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
7
15
771515
4
15
÷
1
9
                   
(5)(80-9.8)×0.6-2.12
(6)(1-
5
11
)×(
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
4
15
441515
1
9
                   
(5)(80-9.8)×0.6-2.12
(6)(1-
5
11
)×(
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
1
9
1199

5
11
)×(
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
5
11
551111
1
12
+
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
1
12
111212
3
8
)       
(7)1
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
3
8
3388
4
5
×[(2
1
3
+4.6-2
1
5
)÷2.4].
4
5
4455
1
3
+4.6-2
1
5
)÷2.4].
1
3
1133
1
5
)÷2.4].
1
5
1155
▼优质解答
答案和解析
(1)600-480÷12=600-40=560;(2)6.7-1.75+1.8=4.95+1.8=6.75;(3)1-815×1516=1-12=12;(4)9×715-415÷19=9×715-415×9=9×(715-415)=9×15=95;(5)(80-9.8)×0.6-2.12=70.2×0.6-2.12=42.12-2.12=4...