=18+5/10+(4+0.1)X(7+0.2)- (9+5/10)÷(7+6/10)
=18+5/10+28+8/10+7/10+0.02-(19/2 ÷ 38/5)
=18+2+28+0.02-5/4
=48.02-1.25
=46.77