问题 解答题
下面各题怎样算简便就怎样算
(
1
3
-
1
4
1
2
+
5
6

35÷[(
5
6
-
2
3
)×3]

3.6×98+36×0.2
9.57-(2.57+3.38)-2.62.
答案

(1)(

1
3
-
1
4
1
2
+
5
6

=

1
12
×2+
5
6

=

1
6
+
5
6

=1;

(2)35÷[(

5
6
-
2
3
)×3]

=35÷[

5
6
×3-
2
3
×3],

=35÷[

5
2
-2],

=35÷

1
2

=70;

(3)3.6×98+36×0.2

=3.6×98+3.6×2,

=3.6×(98+2),

=3.6×100,

=360;

(4)9.57-(2.57+3.38)-2.62

=9.57-2.57-(3.38+2.62),

=7-6,

=1.

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