Выполните умножение: а) 2 целых 1/3 * 2 б) 4 целых * 1 целую 1/2 в) 1 целая 1/3 * 9 г) 3/7 * 2 целых 1/3 д) 7/8 * 5 целых

а) 2 1 /3 × 2 = 1 + 2·3 /3 × 2 = 7/ 3 × 2 = 7·2/ 3 = 14/ 3 = 2 + 4·3 /3 = 4 2 /3;б)1 1/ 2 × 4 = 1 + 1·2 /2 × 4 = 3 /2 × 4 = 3·4 /2 = 12/ 2 = 6·2 /2 = 6;в)1 1 /3 × 9 = 1 + 1·3/ 3 × 9 = 4 /3 × 9 = 4·9 \\3 = 36/ 3 = 12·3 /3 = 12 ;г)2 1 /3 × 3 /7 = 1 + 2·3/ 3 × 3/ 7 = 7 /3 × 3 /7 = 7·3/ 3·7 = 21 /21 = 1; д)5 1/ 3 × 7/ 8 = 1 + 5·3 /3 × 7/ 8 = 16 /3 × 7 /8 = 16·7/ 3·8 = 112/ 24 = 14·8 /3·8 = 14/ 3 = 2 + 4·3/ 3 = 4 2/ 3 .