Question

a) [(12+18)x9-70] : 10 b) 314-2x[(16+5)-(83-79)] c) [(8-2)x(3+2)]+100:(7+3) d)205:[(46-3x7)x2:10]

Answer 1

a).[(12+18)×9-70]:10=(30×9-70):10=(270-70):10=200:10=20 b).314-2×[16+5)-(83-79)]=314-2×(21-4)=314-2×17=314-34=280 c).[(8-2)×(3+2)]+100:(7+3)= (6×5)+100:10=30+10=40 d).205:[(46-3×7)×2:10]=205:[(46-21)×2:10]= 205:(25×2:10)=205:(50:10)=205:5=41