This document contains a welcome message and 10 math questions with explanations of the answers. It reviews basic arithmetic operations like addition, subtraction, multiplication and division of positive and negative numbers. Key points covered include: subtracting a larger number from a smaller number yields a negative result; the negative of a negative number is the original number; and the product of a positive number and the negative of another positive number is the negative of their product. It also addresses evaluating square roots and finding integer pairs for equations.

1. WELCOME

2. QUESTION BANK

3. 1) 3-7=……….
a) 4
b) -4
c) 10

4. Crct ans) b) -4
For any two positive number, substracting the
larger from the smaller means, taking the negative
of the smaller substracted from the larger.
so 3-7= -(7-3)=-4

5. 2) -3+7=………..
a)4
b)-4
c)10

6. Crct ans) a)4
For any two positive number, adding the second
to the negative of the first means, substracting
the first from the second.
so -3+7=7-3=4

7. 3)-4-8=…………
a)12
b)4
c)-12

8. Crct ans) C) -12
For any two positive numbers, substracting the
second from the negative of the first means
finding the negative of their sum.
So -4-8=-(4+8)= -12

9. 4) Given z=x-y where x=10 and y= -3 then what
is the value of z ?
a)z= 7
b)z=13
c)z=-13

10. Crct ans ) b) z=13
Substracting the negative of a positive number
means adding that positive number.
so z=x-y implies z=10- -3=10+3=13

11. 5)Given x=-(-4) then find the value of x ?
a)x= -4
b)x= 4
c)x= 0

12. Crct ans ) b) x=4
The negative of the negative of a number is that
number itself.
So –(-4) =4

13. 6)Let x =8 and y =-3 then what is the value of x-y ?
a)x-y= 11
b)x-y= -11
c)x-y= 5

14. Crct ans) a) x-y= 11
For any two number, substracting one from
another is equal to the negative of
substracting in reverse.
i.e x-y= -(y-x) for all numbers x ,y
So x-y implies 8-(-3) = -(-3-8) = -(-11)=11

15. 7)5 multiplied by -8=…………..
a) 40
b) -40
c) 45

16. Crct ans ) b) -40
The product of a positive number and the negative
of a positive number means , the negative of the
product of these positive numbers.
Ie for any two positive numbers x,y
(-x)y= x(-y)=-(xy)
So 5.-8=-(5.8)= -40

17. 8)How many pairs of integers, satisfying the
equation 𝑥2
+ 𝑦2
= 25.
a) 4 pairs
b) 3 pairs
c) 5 pairs

18. Crct ans ) a) 4 pairs
The pairs are 32
+ 42
= 25, −32
+ 42
= 25,
−42
+ 32
= 25, −32
+ −42
= 25
So pairs are (3,4) (-3,4) (3,-4) (-3,-4)
Total no of pairs is 4.

19. 9)The square root of 25 is ……………
a)5
b)-5
c)5,-5

20. Crct ans) c) 5,-5
5 multiplied by 5 gives 25 also -5 multiplied by -5
gives 25 . Therefore square root of 25 is 5 and -5.

21. 10) -6 divided by 2 equal to ……………
a)3
b)-3
c)-2

22. Crct ans ) b) -3
Here (-6) divided by 2 means finding out the
number 2 should be multiplied to get -6.
2 is multiplied by -3 gives -6.
therefore the correct answer is -3.

23. Thank You