ML AGGARWAL CLASS 7 Chapter 1 INTEGERS EXERCISE 1.2

 Exercise 1.2

Question 1

(i) -5,2  i.e -5+2=-3

-6,3 i.e -6+3=-3

(ii) $-2,3$ i.e $-2-3=-5$ (vice versa not possible)

(iii)8,4 i.e 8-4=4 (vice versa not possible)

Question 2

(i) $\begin{aligned}-8, &-13 \\ \text { i.e } &-8-(-13) \\ &=-8+13 \\ &=5 \end{aligned}$

(ii) $\begin{aligned}-12,4 & \\ \text { ie } &-12+4 \\ &=-8 \end{aligned}$

(iii) $-1,2$

i.e $-1-2=-3$

Question 3

-6,-8

i.e [-6-(-8)]

=-6+8=2

Question 4

A scored -30 ,20,0

Total Team A scored = -30+20 +0 = -10

Team B Scored $20,0,-30$

Total team B Scored = $20+0+(-30)=-10$

Scored by team A and B are same = -10 , Yes 

Question 5

$\begin{aligned} S u m &=-72+237+84+72+(-184)+(-37) \\ &=-72+393-184-37 \\ &=393-293 \\ &=100 \end{aligned}$