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(2008•高邮市)用简便方法计算.23-1217-517(34+25)×200.4×1.25×25×8.

题目详情
(2008•高邮市)用简便方法计算.
23-
12
17
-
5
17
      
3
4
+
2
5
)×20      
0.4×1.25×25×8.

12
17
-
5
17
      
3
4
+
2
5
)×20      
0.4×1.25×25×8.
12
17
12121717
5
17
      
3
4
+
2
5
)×20      
0.4×1.25×25×8.
5
17
551717
3
4
+
2
5
)×20      
0.4×1.25×25×8.
3
4
3344
2
5
)×20      
0.4×1.25×25×8.
2
5
2255
▼优质解答
答案和解析
(1)23-
12
17
-
5
17

=23-(
12
17
+
5
17
),
=23-1,
=22;

(2)(
3
4
+
2
5
)×20,
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
12
17
121212171717-
5
17

=23-(
12
17
+
5
17
),
=23-1,
=22;

(2)(
3
4
+
2
5
)×20,
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
5
17
555171717,
=23-(
12
17
+
5
17
),
=23-1,
=22;

(2)(
3
4
+
2
5
)×20,
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
12
17
121212171717+
5
17
),
=23-1,
=22;

(2)(
3
4
+
2
5
)×20,
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
5
17
555171717),
=23-1,
=22;

(2)(
3
4
+
2
5
)×20,
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
3
4
333444+
2
5
)×20,
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
2
5
222555)×20,
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
3
4
333444×20+
2
5
×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
2
5
222555×20,
=15+8,
=23;

(3)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100.
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