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脱式计算，能简便的必须简便715×80%+715÷515÷（4-514-914）0.91×99+91×0.0120-6.25÷（1÷2）14+[78-（38-14）]1.125÷（25+2.5×80%）
题目详情
脱式计算，能简便的必须简便
脱式计算，能简便的必须简便
×80%+
÷5
÷（4-
-
） 0.91×99+91×0.01 20-6.25÷（1÷2）
+[
-（
-
）]1.125÷（
+2.5×80%）
×80%+
÷5
÷（4-
-
） 0.91×99+91×0.01
×80%+
÷5
×80%+
÷5
7 15 7 7 15 15
÷5
7 15 7 7 15 15
÷（4-
-
）
÷（4-
-
）
1 5 1 1 5 5
-
）
5 14 5 5 14 14
）
9 14 9 9 14 14 0.91×99+91×0.01 20-6.25÷（1÷2）
+[
-（
-
）]1.125÷（
+2.5×80%） 20-6.25÷（1÷2）
+[
-（
-
）]
+[
-（
-
）]
1 4 1 1 4 4
-（
-
）]
7 8 7 7 8 8
-
）]
3 8 3 3 8 8
）]
1 4 1 1 4 4 1.125÷（
+2.5×80%）
+2.5×80%）
2 5 2 2 5 5
|
| 0.91×99+91×0.01 | ||||||||||
| 20-6.25÷（1÷2） |
| 1.125÷（
|
|
| 0.91×99+91×0.01 | ||||||||||
| 20-6.25÷（1÷2） |
| 1.125÷（
|
|
| 0.91×99+91×0.01 | ||||||||||
| 20-6.25÷（1÷2） |
| 1.125÷（
|
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▼优质解答
答案和解析
（1）
×80%+
÷5
=
×0.8+
×0.2
=
×（0.8+0.2）
=
×1
=
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 15 7 7 715 15 15×80%+
÷5
=
×0.8+
×0.2
=
×（0.8+0.2）
=
×1
=
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 15 7 7 715 15 15÷5
=
×0.8+
×0.2
=
×（0.8+0.2）
=
×1
=
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 15 7 7 715 15 15×0.8+
×0.2
=
×（0.8+0.2）
=
×1
=
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 15 7 7 715 15 15×0.2
=
×（0.8+0.2）
=
×1
=
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 15 7 7 715 15 15×（0.8+0.2）
=
×1
=
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 15 7 7 715 15 15×1
=
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 15 7 7 715 15 15
（2）
÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 5 1 1 15 5 5÷（4-
-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
5 14 5 5 514 14 14-
）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
9 14 9 9 914 14 14）
=
÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 5 1 1 15 5 5÷[4-（
+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
5 14 5 5 514 14 14+
）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
9 14 9 9 914 14 14）]
=
÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 5 1 1 15 5 5÷[4-1]
=
÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 5 1 1 15 5 5÷3
=
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 15 1 1 115 15 15
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 4 1 1 14 4 4+[
-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 8 7 7 78 8 8-（
-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
3 8 3 3 38 8 8-
）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 4 1 1 14 4 4）]
=
+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 4 1 1 14 4 4+[
-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
7 8 7 7 78 8 8-
]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 8 1 1 18 8 8]
=
+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
1 4 1 1 14 4 4+
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
3 4 3 3 34 4 4
=1
（6）1.125÷（
+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
2 5 2 2 25 5 5+2.5×80%）
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
| 7 |
| 15 |
=
| 7 |
| 15 |
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
| 7 |
| 15 |
=
| 7 |
| 15 |
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
=
| 7 |
| 15 |
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
=
| 7 |
| 15 |
=
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
=
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 15 |
（2）
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 9 |
| 14 |
=
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 5 |
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 5 |
| 14 |
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 9 |
| 14 |
=
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 5 |
=
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 5 |
=
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 15 |
（3）0.91×99+91×0.01
=0.91×99+0.91
=0.91×（99+1）
=0.91×100
=91
（4）20-6.25÷（1÷2）
=20-6.25÷0.5
=20-12.5
=7.5
（5）
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 3 |
| 8 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 4 |
=
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 7 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 8 |
=
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 1 |
| 4 |
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 3 |
| 4 |
=1
（6）1.125÷（
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
| 2 |
| 5 |
=1.125÷（0.4+2）
=1.125÷2.4
=0.46875
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