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下列各题,能用简便的要用简便方法计算.①17.25+3.05+2.75+3.95②24×(34+56-12)③1316×(913×17-913)④(78-516)×(59+23)
题目详情
下列各题,能用简便的要用简便方法计算.
①17.25+3.05+2.75+3.95 ②24×(
+
-
) ①17.25+3.05+2.75+3.95 ②24×(
+
-
)
+
-
)
3 3 4 4
-
)
5 5 6 6
)
1 1 2 2 ③
×(
×17-
) ④(
-
)×(
+
) ③
×(
×17-
)
×(
×17-
)
13 13 16 16
×17-
)
9 9 13 13
)
9 9 13 13 ④(
-
)×(
+
)
-
)×(
+
)
7 7 8 8
)×(
+
)
5 5 16 16
+
)
5 5 9 9
)
2 2 3 3
①17.25+3.05+2.75+3.95 | ②24×(
| ||||||||||||||
③
| ④(
|
①17.25+3.05+2.75+3.95 | ②24×(
| ||||||||||||||
③
| ④(
|
3 |
4 |
5 |
6 |
1 |
2 |
3 |
4 |
5 |
6 |
1 |
2 |
3 |
4 |
5 |
6 |
1 |
2 |
3 |
4 |
5 |
6 |
1 |
2 |
5 |
6 |
1 |
2 |
1 |
2 |
13 |
16 |
9 |
13 |
9 |
13 |
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
13 |
16 |
9 |
13 |
9 |
13 |
13 |
16 |
9 |
13 |
9 |
13 |
13 |
16 |
9 |
13 |
9 |
13 |
9 |
13 |
9 |
13 |
9 |
13 |
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
5 |
16 |
5 |
9 |
2 |
3 |
5 |
9 |
2 |
3 |
2 |
3 |
▼优质解答
答案和解析
①17.25+3.05+2.75+3.95,
=(17.25+2.75)+(3.05+3.95),
=20+7,
=27;
②24×(
+
-
),
=24×
+24×
-24×
,
=18+20-12,
=26;
③
×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
3 3 34 4 4+
-
),
=24×
+24×
-24×
,
=18+20-12,
=26;
③
×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
5 5 56 6 6-
),
=24×
+24×
-24×
,
=18+20-12,
=26;
③
×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
1 1 12 2 2),
=24×
+24×
-24×
,
=18+20-12,
=26;
③
×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
3 3 34 4 4+24×
-24×
,
=18+20-12,
=26;
③
×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
5 5 56 6 6-24×
,
=18+20-12,
=26;
③
×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
1 1 12 2 2,
=18+20-12,
=26;
③
×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
13 13 1316 16 16×(
×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
9 9 913 13 13×17-
),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
9 9 913 13 13),
=
×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
13 13 1316 16 16×
×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
9 9 913 13 13×17-
×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
13 13 1316 16 16×
,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
9 9 913 13 13,
=
×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
9 9 916 16 16×17-
,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
9 9 916 16 16,
=
×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
9 9 916 16 16×16,
=9;
④(
-
)×(
+
),
=
×
,
=
.
7 7 78 8 8-
)×(
+
),
=
×
,
=
.
5 5 516 16 16)×(
+
),
=
×
,
=
.
5 5 59 9 9+
),
=
×
,
=
.
2 2 23 3 3),
=
×
,
=
.
9 9 916 16 16×
,
=
.
11 11 119 9 9,
=
.
11 11 1116 16 16.
=(17.25+2.75)+(3.05+3.95),
=20+7,
=27;
②24×(
3 |
4 |
5 |
6 |
1 |
2 |
=24×
3 |
4 |
5 |
6 |
1 |
2 |
=18+20-12,
=26;
③
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
3 |
4 |
5 |
6 |
1 |
2 |
=24×
3 |
4 |
5 |
6 |
1 |
2 |
=18+20-12,
=26;
③
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
5 |
6 |
1 |
2 |
=24×
3 |
4 |
5 |
6 |
1 |
2 |
=18+20-12,
=26;
③
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
1 |
2 |
=24×
3 |
4 |
5 |
6 |
1 |
2 |
=18+20-12,
=26;
③
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
3 |
4 |
5 |
6 |
1 |
2 |
=18+20-12,
=26;
③
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
5 |
6 |
1 |
2 |
=18+20-12,
=26;
③
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
1 |
2 |
=18+20-12,
=26;
③
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
13 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
13 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
13 |
=
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
13 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
13 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
13 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
13 |
=
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
16 |
=
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
16 |
=9;
④(
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
7 |
8 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
5 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
5 |
9 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
2 |
3 |
=
9 |
16 |
11 |
9 |
=
11 |
16 |
9 |
16 |
11 |
9 |
=
11 |
16 |
11 |
9 |
=
11 |
16 |
11 |
16 |
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