100x33-33x33-33
=33x(100-33-33)
=33x34
=1122
100x33-33x33-33
=33x(100-33)-33
=33x67-33
=2211-33
=2178
100x33-33x33-33=100x33-33x33-33x1
=33x(100-33-1)
=33x66
=2178
tick nha
= ( 100-33-1)nhan cho 33
= 66 nhan 33
=2178
100x33-33x33-33=
=33x(100-33)-33
=33x67-33
=2211-33=2178