一、
1. 10/3 18/25 2
2 1/9 10/3
2.
7/12×4/5+11/5×7/12
=(4/5+11/5)×7/12
=3×7/12
=7/4
(21+7/12)÷7/3
=21×3/7+7/12×3/7
=9+1/4
=37/4
32/33×34
=32/33×33-32/33
=32-32/33
=1024/33
[1-(3/4-2/5)]×25/26
=[1/4+2/5]×25/26
=13/20×25/26
=5/8
2/3+5/18×4/5+7/9
=2/3+2/9+7/9
=5/3
(1/6-1/7)÷1/42
=1/42×42
=1
2/7÷(8/9×2/7)÷8/9
=2/7×9/8×7/2×9/8
=1
[7/11-(8/15-4/11)]÷14/45
=[1-8/15]×45/14
=7/15×45/14
=3/2
二、
| 比 | 25:60 | 1.25:5 | 5/6:4/9 | 18分:3/4时 | | 化简后的比 | 5:12 | 1:4 | 15:8 | 2:5 | | 比值 | 5/12 | 1/4 | 15/8 | 2/5 |
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