Question

1) $4 \times \frac{5}{17} + \frac{8}{17} + 5 \times 7 \times \frac{3}{10} - 2 \frac{4}{15}$
2) $\frac{16}{81} + \frac{15}{57} \times \frac{19}{4}$

Answer 1

Пошаговое объяснение:

№1

1) 4 * 5/17 = 20/17 = 1 4/17

2) 5 * 7 * 3/10 = 105/10 = 10 5/10 = 10 1/2

3) 1 4/17 + 8/17 = 1 12/17

4) 1 12/17 + 10 1/2 = 1 24/34 + 10 17/34 = 11 41/34 = 12 7/34

5) 12 7/34 - 2 4/15 = 12 105/510 - 2 136/510 = 11 615/510 - 2 136/510 = 9 479/510

№2

1) 15/57 * 19/4 = 15/3 * 1/4 = 5 * 1/4 = 5/4 = 1 1/4

2) 16/81 + 1 1/4 = 64/324 + 1 81/324 = 1 145/324