早教吧作业答案频道 -->数学-->
下面各题，怎么简便就怎样算813÷7+17×513（12+13-14）×2457×756．
题目详情
下面各题，怎么简便就怎样算
÷7+
×
（
+
-
）×24
57×
．下面各题，怎么简便就怎样算
÷7+
×
（
+
-
）×24
57×
．
÷7+
×
（
+
-
）×24
57×
．
8 13 8 8 13 13
×
（
+
-
）×24
57×
．
1 7 1 1 7 7
（
+
-
）×24
57×
．
5 13 5 5 13 13
+
-
）×24
57×
．
1 2 1 1 2 2
-
）×24
57×
．
1 3 1 1 3 3
）×24
57×
．
1 4 1 1 4 4
．
7 56 7 7 56 56
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 1 |
| 7 |
| 5 |
| 13 |
（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 5 |
| 13 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 1 |
| 3 |
| 1 |
| 4 |
57×
| 7 |
| 56 |
| 1 |
| 4 |
| 7 |
| 56 |
| 7 |
| 56 |
▼优质解答
答案和解析
（1）
÷7+
×
=
×
+
×
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
8 13 8 8 813 13 13÷7+
×
=
×
+
×
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 7 1 1 17 7 7×
=
×
+
×
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
5 13 5 5 513 13 13
=
×
+
×
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
8 13 8 8 813 13 13×
+
×
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 7 1 1 17 7 7+
×
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 7 1 1 17 7 7×
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
5 13 5 5 513 13 13
=（
+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
8 13 8 8 813 13 13+
）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
5 13 5 5 513 13 13）×
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 7 1 1 17 7 7
=1×
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 7 1 1 17 7 7
=
；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 7 1 1 17 7 7；
（2）（
+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 2 1 1 12 2 2+
-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 3 1 1 13 3 3-
）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 4 1 1 14 4 4）×24
=
×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 2 1 1 12 2 2×24+
×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 3 1 1 13 3 3×24-
×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
1 4 1 1 14 4 4×24
=12+8-6
=20-6
=14；
（3）57×
=（56+1）×
=56×
+1×
=7+
=7
．
7 56 7 7 756 56 56
=（56+1）×
=56×
+1×
=7+
=7
．
7 56 7 7 756 56 56
=56×
+1×
=7+
=7
．
7 56 7 7 756 56 56+1×
=7+
=7
．
7 56 7 7 756 56 56
=7+
=7
．
7 56 7 7 756 56 56
=7
．
7 56 7 7 756 56 56．
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 7 |
| 5 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 5 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 7 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 7 |
=
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 7 |
（2）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 4 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 3 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 1 |
| 4 |
=12+8-6
=20-6
=14；
（3）57×
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 7 |
| 56 |
=（56+1）×
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 7 |
| 56 |
=56×
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 7 |
| 56 |
=7+
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 7 |
| 56 |
=7
| 7 |
| 56 |
| 7 |
| 56 |
看了 下面各题，怎么简便就怎样算8...的网友还看了以下：
用简便方法计算：(1+12+13+14)×(12+13+14+15)−(1+12+13+14+15 2020-05-15 …
若x＝13的13次方,y＝13＋12*13＋12*13的二次方＋12*13的三次方＋…＋12*13 2020-05-17 …
请根据结合律、分配律计算：(12+13+14+…+12010)(1+12+13+…+12009)− 2020-06-19 …
根据12×13=156，在横线里填数．0.12×13=1.2×0.13=1.2×1.3=0.12× 2020-07-18 …
①4x-7×1.3=9.9；②112：0.4=1.35：x；③（2+5+8+…+197）÷（4+7 2020-07-18 …
3.13.12.13怎么乘除加减能得出243.13.12.13这三个数加减乘除随便用每个数只能用一 2020-07-19 …
（4/5+16/11+12/17）÷（6/17＋2/5+8/11）一又3/7×4/5+二又4/7× 2020-07-27 …
勾股定理?1.一个RT三角形,两个直角边是20,99,斜边是多少?2.观察:3^2=4+5=(5+ 2020-08-02 …
福建行测真题数字推理：2,4,6,9,13,19（）选项：A.28B.29C.30D.312+4+6 2020-11-21 …
阅读解答题因为11×3=12×（1-13），13×5=12×（13-15），15×7=12×（15- 2020-12-13 …