74+16-53
=90-53
=37
63+27-15
=90-15
=75
100-(34+26)
=100-60
=40
95-(64-37)
=95-27
=68
73-58+9
=15+9
=24
20+(71-35)
=20+36
=56
74+16-53
=90-53
=37
63+27-15
=90-15
=75
100-(34+26)
=100-60
=40
95-(64-37)
=95-27
=68
73-58+9
=15+9
=24
20+(71-35)
=20+36
=56