18+2×1= 18+2\times1= 18+2×1= ?
According to the order of operations, first put the multiplication operation in parenthesis:18+(2×1)= ? 18+(2\times1)=\text{ ?} 18+(2×1)= ?Then solve the exercise inside the parenthesis:2×1=2 2\times1=2 2×1=2
Which leaves us with:18+2=20 18+2=20 18+2=20
20