# KSEEB Solutions for Class 6 Maths Chapter 11 Algebra Ex 11.3

Students can Download Chapter 11 Algebra Ex 11.3 Questions and Answers, Notes Pdf, KSEEB Solutions for Class 6 Maths helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

## Karnataka State Syllabus Class 6 Maths Chapter 11 Algebra Ex 11.3

Question 1.
Make up as many expressions with numbers ( no variables) as you can from three numbers 5, 7 and 8. Every number should be used not more than once. Use only addition, subtraction and multiplication.
(Hint: Three possible expressions are 5 + (8 – 7), 5 – (8 – 7),(5 × 8) + 7; make the other expressions.)
Solution:
Many expressions can be formed by using the 3 numbers 5, 7 and 8 Some of these are as follows 5 × (8 – 7)
5 × (8 + 7)
(8 + 5) × 7
(8 – 5) × 7
(7 + 5) × 8
(7 – 5) × 8

Question 2.
Which out of the following are expressions with numbers only?
a) y + 3
b) (7 × 20) – 8z
c) 5(21 – 7) + 7 × 2
d) 5
e) 3x
f) 5 – 5n
g) (7 × 20) – (5 × 10) – 45 + p
Solution:
It can be observed that the expressions in alternatives (c) and (d) are formed by using numbers only. Question 3.
Identify the operations(addition, subtraction, division, multiplication) in forming the following expressions and tell how the expressions have been formed.
a) z + 1, z – 1, y + 17, y – 17
Solution:
Subtraction as 1 is subtracted from z
Subtraction as 17 is subtracted from y

b) 17y, $$\frac{y}{17}$$, 5z
Multiplication as y is multiplied as y is multiplied with 17
Division as y is divided by 17
Multiplication as z is multiplied with 5
Multiplication as z is multiplied with 5

c) 2y + 17, 2y – 17
y is multiplied with 2, and 17 is added to the result

d) 7m, -7m + 3, -7m – 3
Multiplication with 2 and 17 is subtracted from the result
Multiplication and subtractions m is multiplied by 7 and 3 is subtracted from the result Question 4.
Give expressions for the following cases.
Solution:
P + 7

b) 7 subtracted from p
P – 7

c) p multiplied by 7
7p

d) p divided by 7
P

e) 7 subtracted from -m
-m – 7

f) -p multiplied by 5
– 5p

g) -p divided by 5
$$\frac{-p}{5}$$

h) p multiplied by -5.
-5p

Question 5.
Give expressions in the following cases.
Solution:
2m + 11

b) 11 subtracted from 2m
2m – 11

c) 5 times y to which 3 is added
5y + 3

d) 5 times y from which 3 is subtracted
5y – 3

e) y is multiplied by -8
-8y

f) y is multiplied by -8 and then 5 is added to the result
-8y + 5

g) y is multiplied by 5 and the result is subtracted from 16
16 – 5y

h) y is multiplied by -5 and the result is added to 16
-5y + 16 Question 6.
a) Form expressions using t and 4. Use not more than one number operation. Every expression must have t in it.
Solution:
t + 4, +t – 4, 4 +, $$\frac{t}{4}$$, $$\frac{4}{t}$$, -4 – t, 4 + t

b) Form expressions using y, 2 and 7. Every expression must have y in it. Use only two number operations. These should be different.
Solution:
2y + 7, 2y – 7, 7y + 2….