选择合理的方法进行计算.56+34-131112-(16+18)1019+718-1019+11184-(34-38)715-(12-815)11-710-310.-数学

题目简介

选择合理的方法进行计算.56+34-131112-(16+18)1019+718-1019+11184-(34-38)715-(12-815)11-710-310.-数学

题目详情

选择合理的方法进行计算.
5
6
+
3
4
-
1
3
11
12
-(
1
6
+
1
8
10
19
+
7
18
-
10
19
+
11
18
4-(
3
4
-
3
8
7
15
-(
1
2
-
8
15
11-
7
10
-
3
10
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
6
+class="stub"3
4
-class="stub"1
3

=class="stub"10
12
+class="stub"9
12
-class="stub"4
12

=class="stub"15
12

=1class="stub"1
4


(2)class="stub"11
12
-(class="stub"1
6
+class="stub"1
8
),
=class="stub"11
12
-(class="stub"4
24
+class="stub"3
24
),
=class="stub"22
24
-class="stub"7
24

=class="stub"15
24

=class="stub"5
8


(3)class="stub"10
19
+class="stub"7
18
-class="stub"10
19
+class="stub"11
18

=(class="stub"10
19
-class="stub"10
19
)+(class="stub"7
18
+class="stub"11
18
),
=0+1,
=1;

(4)4-(class="stub"3
4
-class="stub"3
8
),
=4-(class="stub"6
8
-class="stub"3
8
),
=4-class="stub"3
8

=3class="stub"5
8


(5)class="stub"7
15
-(class="stub"1
2
-class="stub"8
15
)

=class="stub"7
15
+class="stub"8
15
-class="stub"1
2

=1-class="stub"1
2

=class="stub"1
2


(6)11-class="stub"7
10
-class="stub"3
10

=11-(class="stub"7
10
+class="stub"3
10
),
=11-1,
=10;

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