№1.а) ( 11/12 - 0,75) + 1/16 = (11/12 - 3/4) + 1/16 == (11/12 - 9/12) + 1/16 = 2/12 + 1/16 == 1/6 + 1/16 = 8/48 + 3/48 = 11/48б) 7 - 4 3/4 - 1 2/3 = 2 1/4 - 1 2/3= = 2 3/12 - 1 8/12= 7/12№2.6 1/6 - (х+0,375) = 3 7/24х + 0,375 = 6 1/6 - 3 7/24х + 0,375 = 6 4/24 - 3 7/24х + 0,375 = 2 21/24х + 0,375= 2,875х=2,875 - 0,375х= 2,5проверим:6 1/6 - ( 2,5 +0,375) = 3 7/246 1/6 - 2,875 = 3 7/246 1/6 - 2 7/8 = 3 7/246 8/48 - 2 42/48 = 3 7/243 14/48 = 3 7/243 7/24 = 3 7/24б)8 1/4 - (х - 3 5/9 ) = 2 7/128 1/4 - х + 3 5/9 = 2 7/128 9/36 - х + 3 20/36 = 2 7/1211 29/36 - х= 2 7/12х= 11 29/36 - 2 7/12 = 11 29/36 - 2 21/36= 9 8/36х= 9 2/9проверим:8 1/4 - ( 9 2/9 - 3 5/9 ) = 2 7/128 1/4 - 5 6/9 = 2 7/128 1/4 - 5 2/3 = 2 7/128 3/12 - 5 8/12 = 2 7/122 7/12 = 2 7/12