问题 解答题
计算.
(253-159)×(27÷9)6.8+2.37+7.63+4.211-
1
3
-
2
3
5
8
÷[(
1
2
+
2
3
)×
4
7
0.6×(5.3-1.7)÷0.9.
答案

(1)(253-159)×(27÷9),

=94×3,

=282;

(2)6.8+2.37+7.63+4.2,

=(6.8+4.2)+(2.37+7.63),

=11+10,

=21;

(3)11-

1
3
-
2
3

=11-(

1
3
+
2
3
),

=11-1,

=10;

(4)

5
8
÷[(
1
2
+
2
3
)×
4
7
],

=

5
8
÷[
7
6
×
4
7
],

=

5
8
÷
2
3

=

15
16

(5)0.6×(5.3-1.7)÷0.9,

=0.6×3.6÷0.9,

=2.16÷0.9,

=2.4.

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