a) 210:[16+3.(6+3.2^2)]-3
=210:[16+3.(6+3.4)]-3
=210:[16+3.(6+12)]-3
=210:[16+3.18]-3
=210:[16+54]-3
=210:70-3
=3-3
=0
\(500-\left\{5.\left[409.\left(2^3.3-21\right)^2\right]\right\}-3\)
500-{5.[409.(8.3-21)^2]}-3
500-{5.[409.(24-21)^2]}-3
500-{5.[409.3^2]}-3
500-{5.[409.9]}-3
500-{5.3681}-3
500-18405-3
...............
tự làm nốt nha