用自己喜欢的方法计算下面各题.815+49-215112-14+51297+18+38+570.125+711-711+718.-数学

题目简介

用自己喜欢的方法计算下面各题.815+49-215112-14+51297+18+38+570.125+711-711+718.-数学

题目详情

用自己喜欢的方法计算下面各题.
8
15
+
4
9
-
2
15

1
12
-
1
4
+
5
12

9
7
+
1
8
+
3
8
+
5
7

0.125+
7
11
-
7
11
+
71
8
题型:解答题难度:中档来源:不详

答案


(1)class="stub"8
15
+class="stub"4
9
-class="stub"2
15

=class="stub"8
15
-class="stub"2
15
+class="stub"4
9

=class="stub"2
5
+class="stub"4
9

=class="stub"38
45


(2)class="stub"1
12
-class="stub"1
4
+class="stub"5
12

=class="stub"1
12
+class="stub"5
12
-class="stub"1
4

=class="stub"1
2
-class="stub"1
4

=class="stub"1
4


(3)class="stub"9
7
+class="stub"1
8
+class="stub"3
8
+class="stub"5
7

=(class="stub"9
7
+class="stub"5
7
)+(class="stub"1
8
+class="stub"3
8
),
=2+class="stub"1
2

=2class="stub"1
2


(4)0.125+class="stub"7
11
-class="stub"7
11
+class="stub"71
8

=(0.125+class="stub"71
8
)+(class="stub"7
11
-class="stub"7
11
),
=9+0,
=9.

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