6 2/5×7 7/9-2 2/9*6 2/5 Срочно пжжжж​

6 2/5 = (6 * 5 + 2) / 5 = 32/5

7 7/9 = (7 * 9 + 7) / 9 = 70/9

2 2/9 = (2 * 9 + 2) / 9 = 20/9

(32/5) × (70/9) - (20/9) × (32/5)

= (32/5) × (70/9) - (20/9) × (32/5)

= (32/5) × (70/9) - (20/9) × (32/5)

= (32 × 70) / (5 × 9) - (20 × 32) / (9 × 5)

= (2240/45) - (640/45)

= (2240 - 640) / 45

= 1600/45

= 320/9

320/9.