$\left | -59 \right |$ = 59
$\left | -\frac{3}{7} \right |$ = $-\frac{3}{7}$
$\left | 1,23 \right |$ = 1,23
$\left | -\sqrt{7} \right | = -\sqrt{7}$
1. Tìm:
$\left | -59 \right |$; $\left | -\frac{3}{7} \right |$; $\left | 1,23 \right |$; $\left | -\sqrt{7} \right |$
$\left | -59 \right |$ = 59
$\left | -\frac{3}{7} \right |$ = $-\frac{3}{7}$
$\left | 1,23 \right |$ = 1,23
$\left | -\sqrt{7} \right | = -\sqrt{7}$