怎样算简便就怎样算.13+16+2937+34-111458-(38+14)87-59-49415+79+1115-49914-38+514-18.-数学

题目简介

怎样算简便就怎样算.13+16+2937+34-111458-(38+14)87-59-49415+79+1115-49914-38+514-18.-数学

题目详情

怎样算简便就怎样算.
1
3
+
1
6
+
2
9

3
7
+
3
4
-
11
14

5
8
-(
3
8
+
1
4
8
7
-
5
9
-
4
9
4
15
+
7
9
+
11
15
-
4
9
9
14
-
3
8
+
5
14
-
1
8
题型:解答题难度:中档来源:不详

答案

class="stub"1
3
+class="stub"1
6
+class="stub"2
9

=[18×(class="stub"1
3
+class="stub"1
6
+class="stub"2
9
)]÷18,
=[18×class="stub"1
3
+18×class="stub"1
6
+18×class="stub"2
9
]÷18,
=[6+3+4]÷18,
=class="stub"13
18


class="stub"3
7
+class="stub"3
4
-class="stub"11
14

=[28×(class="stub"3
7
+class="stub"3
4
-class="stub"11
14
)]÷28,
=[28×class="stub"3
7
+28×class="stub"3
4
-28×class="stub"11
14
]÷28,
=[12+21-22]÷28,
=11÷28,
=class="stub"11
28


class="stub"5
8
-(class="stub"3
8
+class="stub"1
4
),
=class="stub"5
8
-class="stub"3
8
-class="stub"2
8

=0;

class="stub"8
7
-class="stub"5
9
-class="stub"4
9

=class="stub"8
7
-(class="stub"5
9
+class="stub"4
9
),
=class="stub"8
7
-1,
=class="stub"1
7


class="stub"4
15
+class="stub"7
9
+class="stub"11
15
-class="stub"4
9

=(class="stub"4
15
+class="stub"11
15
)+(class="stub"7
9
-class="stub"4
9
),
=1+class="stub"1
3

=1class="stub"1
3


class="stub"9
14
-class="stub"3
8
+class="stub"5
14
-class="stub"1
8

=(class="stub"9
14
+class="stub"5
14
)-(class="stub"3
8
+class="stub"1
8
),
=1-class="stub"1
2

=class="stub"1
2

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