66-6+7+23-18+2
= (66-6) + (7+23) - (18-2)
= (60 + 30) - 16
= 90 - 16
= 74
66 - 6 + 7 + 23 - 18 + 2
= 60 + 30 - 18 + 2
= 90 - 18 + 2
=72 + 2
= 74
66 - 6 + 7 +23 - 18 + 2
= ( 66 - 6 ) + ( 7 + 23 ) - 18 + 2
= 60 + 30 - 18 + 2
= 90 - 18 + 2
= 90 + ( 18 - 2 )
= 90 + 16
= 106
66-6+7+23-18+2
=(66-6)+(7+23)-(18+2)
=60+30+20
=90+20
=110
66-6+7+23+18+2
=(66-6) +( 7+23 ) +(18+2)
=60+30+20
= 90+20
=110
66 - 6 + 7 + 23 - 18 + 2
= ( 66 - 6 ) + ( 7+ 23 ) - ( 18 + 2 )
= 60 + 30 - 20
= 90 - 20
= 70