Std-1 UNIT-21 Maths worksheet Q1. Solve these following. a) v 6-2=___ 4-2=___ 2-2=___ b) 8-4=____ 4-4=____ c) 10-2=___ 8-2=___ 6-2=___ 4-2=___ 2-2=___ d) 15-5=____ 10-5=____ 5-5=_____