Test, Order of operations(BLUE):

a) $\displaystyle 68-24-12=$ b) $\displaystyle 348-(177-86)=$ c) $\displaystyle 77\cdot 9= $ d) $\displaystyle 11\cdot25=$ e) $\displaystyle 1000\cdot 672= $ f) $\displaystyle 15\cdot(18-3)=$ g) $\displaystyle 520:4= $ h) $\displaystyle 345:23=$ i) $\displaystyle 2+3\cdot 5= $ j) $\displaystyle 2 \cdot 5-6:2=$ k) $\displaystyle 4+(7-5)\cdot 3=$ l) $\displaystyle 30-6\cdot (12-4\cdot 2)=$ m) $\displaystyle 5 \cdot [27-3\cdot (14-4\cdot 3)]= $