问题 解答题
脱式计算,能简算的要简算.
(1)0.95×
2
7
+
5
7
×0.95
(2)
5
19
-
13
17
-
4
17
+
14
19

(3)10000÷25÷8÷4 
(4)
5
9
+
7
9
-1.625-2.375+3.
答案

(1)0.95×

2
7
+
5
7
×0.95,

=0.95×(

2
7
+
5
7
),

=0.95;

(2)

5
19
-
13
17
-
4
17
+
14
19

=(

5
19
+
14
19
)-(
13
17
+
4
17
),

=1-1,

=0;

(3)10000÷25÷8÷4,

=10000÷(25×8×4),

=10000÷800,

=12.5;

(4)

5
9
+
7
9
-1.625-2.375+3,

=(

5
9
+
7
9
+3)-(1.625+2.375),

=4

1
3
-4,

=

1
3

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