2 Answers
See the result is very simple.
TIps- You should know the addition rule of integer.
Solution to the problem:
Question: ( - 4a) + ( -6a)
1. We can write (-4a) as -4a = (-a) + (-a) + (-a) +(-a)
2. Similarly , we can write (-6a) = (-a) +(-a) +(-a) +(-a) +(-a) + (-a)
3. Then, ( - 4a) + ( -6a) = [(-a) + (-a) + (-a) +(-a)] + [ (-a) +(-a) +(-a) +(-a) +(-a) + (-a)]
Now, count the number of a , it is 10,
your result is -10a.
Note: Remember! when we add , a +a, it is equal to 2a
i.e. a +a = 2a, in fact it is +2a
We do not write the "+" sign if it comes first.
In the same way (-a) + (-a) = -2a
Hope this helped you to some extent. Now enjoy doing such kind of problems with your friends.
13 years ago. Rating: 1 | |
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