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脱式计算（能简算的要简便计算）27+6.7+57+22.3；813÷7+17×513；12.5×3.2×0.25；49÷[45-（15+13）]．
题目详情
脱式计算（能简算的要简便计算）
+6.7+
+22.3；
÷7+
×
；
12.5×3.2×0.25；
÷[
-（
+
）]．
+6.7+
+22.3；
÷7+
×
；
12.5×3.2×0.25；
÷[
-（
+
）]．
2 2 7 7
+22.3；
÷7+
×
；
12.5×3.2×0.25；
÷[
-（
+
）]．
5 5 7 7
÷7+
×
；
12.5×3.2×0.25；
÷[
-（
+
）]．
8 8 13 13
×
；
12.5×3.2×0.25；
÷[
-（
+
）]．
1 1 7 7
；
12.5×3.2×0.25；
÷[
-（
+
）]．
5 5 13 13
÷[
-（
+
）]．
4 4 9 9
-（
+
）]．
4 4 5 5
+
）]．
1 1 5 5 +
）]．
1 1 3 3
| 2 |
| 7 |
| 5 |
| 7 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
12.5×3.2×0.25；
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
12.5×3.2×0.25；
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
12.5×3.2×0.25；
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 5 |
| 7 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
12.5×3.2×0.25；
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
12.5×3.2×0.25；
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 7 |
| 5 |
| 13 |
12.5×3.2×0.25；
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 5 |
| 13 |
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 3 |
| 1 |
| 3 |
▼优质解答
答案和解析
（1）
+6.7+
+22.3
=（
+
）+（6.7+22.3）
=1+29
=30；
（2）
÷7+
×
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
2 2 27 7 7+6.7+
+22.3
=（
+
）+（6.7+22.3）
=1+29
=30；
（2）
÷7+
×
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
5 5 57 7 7+22.3
=（
+
）+（6.7+22.3）
=1+29
=30；
（2）
÷7+
×
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
2 2 27 7 7+
）+（6.7+22.3）
=1+29
=30；
（2）
÷7+
×
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
5 5 57 7 7）+（6.7+22.3）
=1+29
=30；
（2）
÷7+
×
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
8 8 813 13 13÷7+
×
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
1 1 17 7 7×
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
5 5 513 13 13
=（
+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
8 8 813 13 13+
）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
5 5 513 13 13）×
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
1 1 17 7 7
=1×
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
1 1 17 7 7
=
；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
1 1 17 7 7；
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
4 4 49 9 9÷[
-（
+
）]
=
÷[
-
]
=
÷
=1
．
4 4 45 5 5-（
+
）]
=
÷[
-
]
=
÷
=1
．
1 1 15 5 5+
）]
=
÷[
-
]
=
÷
=1
． +
1 1 13 3 3）]
=
÷[
-
]
=
÷
=1
．
4 4 49 9 9÷[
-
]
=
÷
=1
．
4 4 45 5 5-
]
=
÷
=1
．
8 8 815 15 15]
=
÷
=1
．
4 4 49 9 9÷
=1
．
4 4 415 15 15
=1
．
2 2 23 3 3．
| 2 |
| 7 |
| 5 |
| 7 |
=（
| 2 |
| 7 |
| 5 |
| 7 |
=1+29
=30；
（2）
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
=（
| 2 |
| 7 |
| 5 |
| 7 |
=1+29
=30；
（2）
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 5 |
| 7 |
=（
| 2 |
| 7 |
| 5 |
| 7 |
=1+29
=30；
（2）
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
=1+29
=30；
（2）
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 5 |
| 7 |
=1+29
=30；
（2）
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 1 |
| 7 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 5 |
| 13 |
=（
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 5 |
| 13 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 1 |
| 7 |
=
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 1 |
| 7 |
（3）12.5×3.2×0.25
=（12.5×8）×（0.4×0.25）
=100×0.1
=10；
（4）
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 4 |
| 9 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 1 |
| 3 |
=
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 4 |
| 9 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 8 |
| 15 |
=
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 4 |
| 9 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 4 |
| 15 |
=1
| 2 |
| 3 |
| 2 |
| 3 |
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