问题 解答题
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
答案

(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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