Question

высислите:
1) |-5,7|+|-2,5|-|4,32|
2) |5/42|÷|-1 2/3|

Answer 1

| -5,7 | + | -2,5 | - | 4,32 | = 5,7 + 2,5 - 4,32 = 3,88
$| \frac{5}{42} | \div | - 1 \frac{2}{3} | = \frac{5}{42} \times \frac{3}{5} = \frac{3}{42} = \frac{1}{14}$