8 Поставь скобки в выражениях, чтобы получились верные высказывания: a) 72:12+6.4 = 48; 72:12+6.4 = 30; 72:12+6.4 = 16; 72:12+6.4 = 2;

a) 72:12+6⋅4 = 48; \[ (72:12+6) \cdot 4 = (6+6) \cdot 4 = 12 \cdot 4 = 48 \] 72:12+6⋅4 = 30; \[ 72:(12+6 \cdot 4) = 72:(12+24) = 72:36 = 2 \] 72:12+6⋅4 = 16; \[ 72:(12+6) \cdot 4 = 72:18 \cdot 4 = 4 \cdot 4 = 16 \] 72:12+6⋅4 = 2; \[ 72:(12+6 \cdot 4) = 72:(12+24) = 72:36 = 2 \] б) 120-40:5⋅2 = 224; \[ (120-40):(5 \cdot 2) = 80:10 = 8 \] 120-40:5⋅2 = 116; \[ 120-40:(5 \cdot 2) = 120-40:10 = 120-4 = 116 \] 120-40:5⋅2 = 104; \[ 120-(40:5 \cdot 2) = 120-(8 \cdot 2) = 120-16 = 104 \] 120-40:5⋅2 = 32. \[ (120-40:5) \cdot 2 = (120-8) \cdot 2 = 112 \cdot 2 = 224 \]