题目内容

脱式计算:(能简算要简算)
0.4×5÷0.4×58×25×125×40
1
4
+
14
15
)-
14
15
(1)0.4×5÷0.4×5,
=2÷0.4×5,
=5×5,
=25;

(2)8×25×125×40,
=(8×125)×(25×40),
=1000×1000,
=1000000;

(3)(
1
4
+
14
15
)-
14
15

=
1
4
+
14
15
-
14
15

=
1
4
+(
14
15
-
14
15
),
=
1
4
+0,
=
1
4
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