Question

1. Verify a-(-b)=a+b for the following values of a and b


i. a=2, b=8 ii. a=-4, b=8.


2. Rita deposits Rs.5000 in her bank account and withdraws

Rs.1842 from it, the next day. Find the balance in Rita’s

account after withdrawal.


3. In a quiz, positive marks are given for correct answers and

negative marks are given for incorrect answers. If Rahul’s

scores are 30,-6,-15, 10 and 8, what was his total at the

end?


4. Write down a pair of integers whose

i. Sum is -7 ii. Difference is 2.


5. In a quiz, team A scored -20, 8, 0 and team B scored 5, 0,

- 10 in three successive rounds. Which team scored more?​

Answer 1

Answer:

1)i)LHS=a-(-b)

=2-(-8)

=2+8=10

RHS=a+b

=2+8=10

LHS=RHS

Verified

ii)LHS=a-(-b)

=-4-(-8)

=-4+8=4

RHS=a+b

=-4+8=4

LHS=RHS

Verified

2) Rita Deposited =₹5000

Withdrawn=₹-1842

Total Balance=5000+(-1842)

5000-1842=3158

3)Total score=30+(-6)+(-15)+10+8

=30+10+8+(-6)+(-15)

=48+(-21)=48-21=27

4)I)(-3)+(-4)=-7

ii)1-(-1)

5)Team A scored=(-20)+8+0=(-12)

Team B scored=5+0+(-10)=(-5)

so team B scored more