Question

1146. Знайдіть значення виразу:
1) ⋅ ⋅ 5 16 3
8 15 7 ; 2) ⋅ ⋅⋅ 3 21 8 12 2
8 19 11 15 ; 3) ⋅ ⋅⋅ 4 3 345 0 7,89
5 .

Answer 1

$\frac{5}{8} \times \frac{16}{15} \times \frac{3}{7} = \frac{1 \times 2 \times 1}{1 \times 1 \times 7} = \frac{2}{7}$

$1 \frac{3}{8} \times 2 \frac{2}{19} \times \frac{1}{11} \times 2 \frac{8}{15} = \frac{11 \times 40 \times 1 \times 38}{8 \times 19 \times 11 \times 15} = \frac{1 \times 1 \times 1 \times 2}{1 \times1 \times 1 \times 3} = \frac{2}{3}$

$3 \frac{4}{5} \times 345 \times 0 \times 7.89 = 0$