90−2+9−8= ? 90-2+9-8=\text{ ?} 90−2+9−8= ?
According to the order of operations, we will solve the exercise from left to right since the only operations in it are addition and subtraction:
90−2=88 90-2=88 90−2=88
88+9=97 88+9=97 88+9=97
97−8=89 97-8=89 97−8=89
89