脱式计算能简算的要简算.(1)27-15+1235(2)821+(314-17)(3)1-[1760-(215+320)](4)517+813+217+513(5)35-711-411(6)78+34

题目简介

脱式计算能简算的要简算.(1)27-15+1235(2)821+(314-17)(3)1-[1760-(215+320)](4)517+813+217+513(5)35-711-411(6)78+34

题目详情

脱式计算能简算的要简算.
(1)
2
7
-
1
5
+
12
35
(2)
8
21
+(
3
14
-
1
7
(3)1-[
17
60
-(
2
15
+
3
20
)]
(4)
5
17
+
8
13
+
2
17
+
5
13
(5)35-
7
11
-
4
11
(6)
7
8
+
3
4
-
7
8
+
3
4
题型:解答题难度:中档来源:不详

答案


(1)class="stub"2
7
-class="stub"1
5
+class="stub"12
35

=class="stub"3
35
+class="stub"12
35

=class="stub"3
7


(2)class="stub"8
21
+(class="stub"3
14
-class="stub"1
7
),
=class="stub"8
21
+class="stub"1
14

=class="stub"19
42


(3)1-[class="stub"17
60
-(class="stub"2
15
+class="stub"3
20
)],
=1-[class="stub"17
60
-class="stub"17
60
],
=1-0,
=1;

(4)class="stub"5
17
+class="stub"8
13
+class="stub"2
17
+class="stub"5
13

=(class="stub"5
17
+class="stub"2
17
)+(class="stub"8
13
+class="stub"5
13
),
=class="stub"7
17
+1,
=1class="stub"7
17


(5)35-class="stub"7
11
-class="stub"4
11

=35-(class="stub"7
11
+class="stub"4
11
),
=35-1,
=34;

(6)class="stub"7
8
+class="stub"3
4
-class="stub"7
8
+class="stub"3
4

=(class="stub"7
8
-class="stub"7
8
)+(class="stub"3
4
+class="stub"3
4
),
=0+class="stub"3
2

=class="stub"3
2

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