Add without using number line:
(a) $11+(-7)$
(b) $(-13)+(+18)$
(c) $(-10)+(+19)$)
(d)$(-250)+(+150)$

Given :

The given terms are, 

(a) $11+(-7)$
(b) $(-13)+(+18)$
(c) $(-10)+(+19)$)
(d) $(-250)+(+150)$.

To do :

We have to add the given terms without using the number line.

Solution :

We know that,

$(+) \times (-) = (-)$

$(+) \times (+) = +$

(a) $11+(-7) = 11-7 = 4$.

The sum of $11$ and $-7$ is $4$.

(b) $(-13)+(+18) = -13+18 = 18-13=5$.

The sum of $-13$ and $18$ is $5$.

(c) $(-10)+(+19)= -10+19 =19-10=9$.

The sum of $-10$ and $19$ is $9$.

(d) $(-250)+(+150) = -250+150 = -(250-150) = -100$.

The sum of $-250$ and $150$ is $-100$.

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Updated on: 10-Oct-2022

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