1) 5 7/18 - 1 16/45 = 97/18 - 61/45 = (485-122) /90 = 363/90 = 121/30
2) 121/30 : /-2,2/ = 121/30 : 22/10 = 121 *10/30*22 = 121/3*22 = 121/ 66
3) /2,6/ + 5/16 +/-0,15/ = 2,6 + 0,15 + 5/16 = 2,75 + 5/16 = 275/100 + 5/16 =
= 11/4 + 5/16 = (44 +5)/16 = 49/16
4) 49/16 : 2 5/8 = 49/16 : 21/8 = 49/16 * 8 /21 = 49*8/16*21= 49/2*21 = 49/42
5) 121/66 : 49/42 = 121 *42/ 66*49 = 121*7/11*49 = 121/11*7 =121/77
6) 121/77 * 1,4 = 121/77 * 14/10 = 121*14/77*10 = 121 *2/11*10 = 121/11*5 = 121/55 = 2,2
7) 0,8: /-0,02/ = 0,8 : 0,02 = 40
8) 40 : 5 = 8
9) 8 -6,2 = 1,8
10) 2,2 + 1,8 = 4