题目内容

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.
(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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