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1. 8/25 ×100 %=32%
2. 4/7 +3/2 =29/14 = 2 1/14
3 . 0,72+2,25 =2,97
4. 0,62-0,315=0,315
5.24/40×100=60
6.13/4 × 9/10 =117/40 =2 37/40
7.6/7×10/8 =15/14 =1 1/14
8.1/4×9/2 =9/8 =1 1/8
9.25 : 12
10. 1: 248.000