402+105−2= \frac{40}{2}+\frac{10}{5}-2= 240+510−2=
First we solve the fractions:
402=20 \frac{40}{2}=20 240=20
105=2 \frac{10}{5}=2 510=2
Now we get the exercise:
20+2−2= 20+2-2= 20+2−2=
Keep in mind that the following exercise gives us the result zero:
2−2=0 2-2=0 2−2=0
Therefore:
20+0=20 20+0=20 20+0=20
20 20 20