Вычислить 4/5 + 0.6-1/3 4/27*9/16 22/12*0.8 72/5+31/4-3/8 33/5*11/9

№1.

4/5 + 0,6 - 1/3 = 4/5 + 6/10 - 1/3 = (4 * 2) / (5 * 2) + 6/10 - 1/3 = 8/10 + 6/10 - 1/3 = 14/10 - 1/3 = 7/5 - 1/3 = (7 * 3) / (5 * 3) - (1 * 5) / (3 * 5) = 21/15 - 5/15 = 16/15 = 1 1/15.

№2.

4/27 * 9/16 = 1/3 * 1/4 = 1/12.

№3.

22/12 * 0,8 = 22/12 * 8/10 = 11/6 * 4/5 = 11/3 * 2/5 = 22/15 = 1 7/15.

№4.

72/5 + 31/4 - 3/8 = (72 * 4) / (5 * 4) + (31 * 5) / (4 * 5) - 3/8 = 288/20 + 155/20 - 3/8 = 443/20 - 3/8 = (443 * 2) / (20 * 2) - (3 * 5) / (8 * 5) = 886/40 - 15/40 = 871/40 = 21 31/40.

№5.

33/5 * 11/9 = 363/45 = 8 3/45 = 8 1/15.