04
а)7/9 * 1 2/7 - 3,72 +8 = 7/9+9/7 + 4,28 = 1 + 4,28 = 5,28
б) (0,25+1 1/2) / 55/7 * 11/7 = (1/4 +3/2) / 55/7 * 11/7 = 7/4 / 55/7 *11/7 =49/220 * 11/7 = 7/20 =0,35
05
а)1 2/3 /5 + 0,175 * 20/7 = 5/3 / 5 + 7/40 * 20/7 = 1/3 + 1/2 = 2/6 + 3/6 = 5/6
б) 2/3 - 36/(11,8 + 1/5) = 2/3 + 36 / (11,8 + 0,2) = 2/3 +36 / 12 = 2/3 + 3 = 3 2/3