12+0.5−0= \frac{1}{2}+0.5-0= 21+0.5−0=
According to the order of operations, we will solve the exercise from left to right.
12=0.5 \frac{1}{2}=0.5 21=0.5
0.5+0.5=1 0.5+0.5=1 0.5+0.5=1
1−0=1 1-0=1 1−0=1
1