Question:

Add without using number line :
(a) 11 + (– 7)
(b) (– 13) + (+ 18)
(c) (– 10) + (+ 19)
(d) (– 250) + (+ 150)
(e) (– 380) + (– 270)
(f) (– 217) + (– 100)

Updated On: Sep 12, 2024
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Solution and Explanation

(a) \(11+(–7)\)
\(= 11-7\)
\(= 4\)


(b)\( (–13)+(+18)\)
\(= (-13)+18\)
\(= 5\)


(c)\( (–10)+(+19)\)
\(= -10+19\)
\(= 9\)


(d) \((–250)+(+150)\)
\(= -250+150\)
\(= -100\)


(e) \((–380)+(–270)\)
\(= -380-270\)
\(= -650\)


(f) \((–217)+(–100)\)
\(= -217+100\)
\(= -317\)

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