题目内容

计算,能简算的要简算.
①23-
12
17
-
5
17

②(3618÷18-145)×20
③4.6×
11
8
+8.4÷
8
11
-
11
8
×5.
①23-
12
17
-
5
17

=23-(
12
17
+
5
17
),
=23-1,
=22;

②(3618÷18-145)×20,
=(201-145)×20,
=56×20,
=1120;

③4.6×
11
8
+8.4÷
8
11
-
11
8
×5,
=4.6×
11
8
+8.4×
11
8
-
11
8
×5,
=(4.6+8.4-5)×
11
8

=8×
11
8

=11.
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