问题 解答题
简算.
23-
12
17
-
5
17
1.8×
1
4
+2.2×25%44×(
5
11
-
1
4
答案

(1)23-

12
17
-
5
17

=23-(

12
17
+
5
17
),

=23-1,

=22;

(2)1.8×

1
4
+2.2×25%,

=1.8×0.25+2.2×0.25,

=0.25×(1.8+2.2),

=0.25×4,

=1;

(3)44×(

5
11
-
1
4
),

=44×

5
11
-44×
1
4

=20-11,

=9.

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