题目内容
| 下面各题，怎样算简便就怎样算 12×（
| 0.25×3.2×1.25 | 1-
| ||||||||||||||
6÷
| 18.15-（3.5-1.75） | 48×
|
12×（
+
-
）
=12×
+12×
-12×
=2+3-4
=1；
0.25×3.2×1.25
=0.25×0.4×8×1.25
=0.1×10
=1；
1-
-
-
-
=1-（
+
+
+
）
=1-（1-
）
=
；
6÷
-
÷6
=6×3-
×
=18-
=17
；
18.15-（3.5-1.75）
=18.25+1.75-3.5
=20-3.5
=16.5；
48×
=（49-1）×
=49×
-1×
=1-
=
．
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 3 |
=12×
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 3 |
=2+3-4
=1；
0.25×3.2×1.25
=0.25×0.4×8×1.25
=0.1×10
=1；
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
=1-（
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
=1-（1-
| 1 |
| 16 |
=
| 1 |
| 16 |
6÷
| 1 |
| 3 |
| 1 |
| 3 |
=6×3-
| 1 |
| 3 |
| 1 |
| 6 |
=18-
| 1 |
| 18 |
=17
| 17 |
| 18 |
18.15-（3.5-1.75）
=18.25+1.75-3.5
=20-3.5
=16.5；
48×
| 1 |
| 49 |
=（49-1）×
| 1 |
| 49 |
=49×
| 1 |
| 49 |
| 1 |
| 49 |
=1-
| 1 |
| 49 |
=
| 48 |
| 49 |
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