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（2011•东莞）递等式计算，能简便的要简便计算．1570-570÷19×250.72÷（12+25）（34+35）÷1200.9×114+9.1÷45．
题目详情
（2011•东莞）递等式计算，能简便的要简便计算．
1570-570÷19×25
0.72÷（
+
）
（
+
）÷
0.9×1
+9.1÷
．
+
）
（
+
）÷
0.9×1
+9.1÷
．
1 1 2 2
）
（
+
）÷
0.9×1
+9.1÷
．
2 2 5 5
+
）÷
0.9×1
+9.1÷
．
3 3 4 4
）÷
0.9×1
+9.1÷
．
3 3 5 5
0.9×1
+9.1÷
．
1 1 20 20
+9.1÷
．
1 1 4 4
．
4 4 5 5
1570-570÷19×25
0.72÷（
| 1 |
| 2 |
| 2 |
| 5 |
（
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
| 1 |
| 2 |
| 2 |
| 5 |
（
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
| 1 |
| 2 |
| 2 |
| 5 |
（
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
| 2 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
| 3 |
| 5 |
| 1 |
| 20 |
0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
| 1 |
| 20 |
| 1 |
| 4 |
| 4 |
| 5 |
| 1 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
▼优质解答
答案和解析
（1）1570-570÷19×25
=1570-30×25
=1570-750
=820；
（2）0.72÷（
+
）
=0.72÷
=0.8；
（3）（
+
）÷
=（
+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
1 1 12 2 2+
）
=0.72÷
=0.8；
（3）（
+
）÷
=（
+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
2 2 25 5 5）
=0.72÷
=0.8；
（3）（
+
）÷
=（
+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
9 9 910 10 10
=0.8；
（3）（
+
）÷
=（
+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
3 3 34 4 4+
）÷
=（
+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
3 3 35 5 5）÷
=（
+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
1 1 120 20 20
=（
+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
3 3 34 4 4+
）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
3 3 35 5 5）×20
=
×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
3 3 34 4 4×20+
×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
3 3 35 5 5×20
=15+12
=27；
（4）0.9×1
+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
1 1 14 4 4+9.1÷
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
4 4 45 5 5
=0.9×
+9.1×
=（0.9+9.1）×
=10×
=12.5．
5 5 54 4 4+9.1×
=（0.9+9.1）×
=10×
=12.5．
5 5 54 4 4
=（0.9+9.1）×
=10×
=12.5．
5 5 54 4 4
=10×
=12.5．
5 5 54 4 4
=12.5．
=1570-30×25
=1570-750
=820；
（2）0.72÷（
| 1 |
| 2 |
| 2 |
| 5 |
=0.72÷
| 9 |
| 10 |
=0.8；
（3）（
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
=（
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 1 |
| 2 |
| 2 |
| 5 |
=0.72÷
| 9 |
| 10 |
=0.8；
（3）（
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
=（
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 2 |
| 5 |
=0.72÷
| 9 |
| 10 |
=0.8；
（3）（
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
=（
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 9 |
| 10 |
=0.8；
（3）（
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
=（
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 3 |
| 4 |
| 3 |
| 5 |
| 1 |
| 20 |
=（
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 3 |
| 5 |
| 1 |
| 20 |
=（
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 1 |
| 20 |
=（
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 3 |
| 4 |
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 3 |
| 5 |
=
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 3 |
| 4 |
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 3 |
| 5 |
=15+12
=27；
（4）0.9×1
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 1 |
| 4 |
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 4 |
| 5 |
=0.9×
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 5 |
| 4 |
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 5 |
| 4 |
=（0.9+9.1）×
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 5 |
| 4 |
=10×
| 5 |
| 4 |
=12.5．
| 5 |
| 4 |
=12.5．
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