问题 解答题
计算下面各题,能简算的要简算:
1
4
+
3
4
×
1
3
3
4
×
1
15
5
7
×
1
4
+
3
4
×
5
7
3
8
+
3
4
+
1
3
)×24
3.6+
3
7
+6.4+
4
7
5
4
-(
2
7
+
1
4
47×
3
46
63×
57
58
3
8
×25-
3
8
答案

(1)

1
4
+
3
4
×
1
3

=

1
4
+
1
4

=

1
2

(2)8×

3
4
×
1
15
=
2
5

(3)

5
7
×
1
4
+
3
4
×
5
7

=

5
7
×(
1
4
+
3
4
),

=

5
7
×1,

=

5
7

(4)(

3
8
+
3
4
+
1
3
)×24,

=

3
8
×24+
3
4
×24+
1
3
×24,

=9+18+8,

=35;

(5)3.6+

3
7
+6.4+
4
7

=(3.6+6.4)+(

3
7
+
4
7
),

=10+1,

=11;

(6)

5
4
-(
2
7
+
1
4
),

=

5
4
-
1
4
-
2
7

=1-

2
7

=

5
7

(7)47×

3
46

=(46+1)×

3
46

=46×

3
46
+
3
46

=3+

3
46

=3

3
46

(8)63×

57
58

=63×(1-

1
58

=63-1

5
58

=61

53
58

(9)

3
8
×25-
3
8

=

3
8
×(25-1),

=

3
8
×24,

=9.

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