Question

$6 \frac{2}{5} \times 1 \frac{9}{16} - (2 \frac{1}{4} ) {}^{2} =$
​

Answer 1

Ответ:

6 2/5 * 1 9/16 - ( 2 ¼ )² = 32/5 * 25/16 - 9/4 * 9/4 = 32/1 * 5/16 - 81/16 = (160-81)/16 = 79/16 = 4 15/16 .

Answer 2

........................