Simplification grade Vth
1. Simplify: [ begin{aligned}[t] 12 – overline{8 – 3 cdot (2 + 1)} end{aligned} ] 2. Simplify: [ begin{aligned}[t] 5 cdot overline{18 div (6 + 3)} + 2 end{aligned} ] 3. Simplify: [ begin{aligned}[t] 9 + overline{20 div 4 cdot (1 + 1)} – 3 end{aligned} ] 4. Simplify: [ begin{aligned}[t] 11 – overline{15 div …