怎样简便就怎么算49-13+59815-15-1334+112+712+3458-(13+0.25)-数学

题目简介

怎样简便就怎么算49-13+59815-15-1334+112+712+3458-(13+0.25)-数学

题目详情

怎样简便就怎么算
4
9
-
1
3
+
5
9
8
15
-
1
5
-
1
3
3
4
+
1
12
+
7
12
+
3
4
5
8
-
1
3
+0.25
题型:解答题难度:中档来源:不详

答案

(1)class="stub"4
9
-class="stub"1
3
+class="stub"5
9

=(class="stub"4
9
+class="stub"5
9
)-class="stub"1
3

=1-class="stub"1
3

=class="stub"2
3


(2)class="stub"8
15
-class="stub"1
5
-class="stub"1
3

=class="stub"8
15
-(class="stub"1
5
+class="stub"1
3
),
=class="stub"8
15
-class="stub"8
15

=0;

(3)class="stub"3
4
+class="stub"1
12
+class="stub"7
12
+class="stub"3
4

=(class="stub"3
4
+class="stub"3
4
)+(class="stub"1
12
+class="stub"7
12
),
=class="stub"3
2
+class="stub"2
3

=2class="stub"1
6


(4)class="stub"5
8
-
class="stub"1
3
+0.25
),
=class="stub"5
8
-
class="stub"7
12

=class="stub"1
24

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