2) 70+ 5.(12-8) = ? 12:6+6.3= ?

2) $$70 + 5 \cdot (12 - 8) = 70 + 5 \cdot 4 = 70 + 20 = 90$$
$$12:6 + 6 \cdot 3 = 2 + 18 = 20$$