题目内容

神机妙算细又巧.
24×(
1
4
+
1
8
+
1
6
)         
4
5
+
1
4
)÷
7
3
+
7
10

7
12
×0.86+14%÷
12
7
     
1
128
+
1
64
+
1
32
+…+
1
4
(1)24×(
1
4
+
1
8
+
1
6
),
=24×
1
4
+24×
1
8
+24×
1
6

=6+3+4,
=9+4,
=13;

(2)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
21
20
×
3
7
+
7
10

=
9
20
+
14
20

=
23
20


(3)
7
12
×0.86+14%÷
12
7

=
7
12
×0.86+0.14×
7
12

=
7
12
×(0.86+0.14),
=
7
12
×1,
=
7
12


(4)
1
128
+
1
64
+
1
32
+…+
1
4

=(
1
64
-
1
128
)+(
1
32
-
1
64
)+(
1
16
-
1
32
)+…+(
1
2
-
1
4
),
=
1
2
-
1
128

=
63
128
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