140−70= 140-70= 140−70=
In order to simplify the resolution process, we begin by using the distributive property for 140:
100+40−70= 100+40-70= 100+40−70=
We then rearrange the exercise using the substitution property into a more practical form:
100−70+40= 100-70+40= 100−70+40=
Lastly we solve the exercise from left to right:
100−70=30 100-70=30 100−70=30
30+40=70 30+40=70 30+40=70
70