1) = 56,211 / 5,6211 = 10
2) = 0,86 ÷ 2,15 = 0,4
3) = (33/16 - 15/14) × 28 = ((231-120) / 112) × 28 = 111/112 × 28 = 111/4 = 27 целых 3/4
4) = 7/25 × 100/49 - 25/7 = 4/7 - 25/7 = - 21/7 = - 3
5) = ((85-22) ÷ 40) × 46/5 = 63/40 × 46/5 = 63/20 × 23/5= 1449/100 = 14 целых 49/100 = 14,49
6) = - 9/25 + 7/25 × 2 = -9/25 +14/25 = 5/25 = 1/5 = 0,2
7) = 1,2 - 0,4 = 0,8
8) = 25/17 ÷ ((3+1) ÷ 17) = 25/17 ÷ 4/17 = 25 × 1/4 =25/4 = 6 целых 1/4 = 6,25
9) = 50+34 = 84
10) = 0,43056 / 0,43056 = 1