Вправи 1051 - 1200 » 1076

Обчисли значення виразу. а) 3/5 + (21/5 – 12/5) = 3/5 + (1 + 6/5 – 12/5) = 3/5 + (1 – 1 + 6/5 – 2/5) = 3/5 + 4/5 = = 7/5 = 12/5 ; б) 32/7 – (21/7 – 14/7) = 32/7 – (1 + 8/7 – 14/7) = 32/7 + (1 – 1 + 8/7 – 4/7) =32/7 – 4/7 = 2 + 9/7 – 4/7 = 25/7 ; в) 121/4 – (33/4 +33/4) = 121/4 – (3 + 3 + 3/4 – 3/4) = 121/4 – 66/4 = 11 + 5/4 – 72/4 = 11 – 7 + 5/4 – 2/4 = 43/4 ; г) 77/8 – (23/8 +17/8) = 77/8 – (2 + 1 + 3/8 + 7/8) = 77/8 – 310/8 = 6 + 15/8 – 310/8 = 6 – 3 + 15/8 – 10/8 = 35/8 .