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.

KSEEB Solutions for Class 6 Maths Chapter 11 Algebra Ex 11.3

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:
Addition as 1 is added to z
Subtraction as 1 is subtracted from z
Addition as 17 is added to y
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
Multiplication and addition
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

KSEEB Solutions for Class 6 Maths Chapter 11 Algebra Ex 11.3

Question 4.
Give expressions for the following cases.
Solution:
a) 7 added to p
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:
a) 11 added to 2m
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

KSEEB Solutions for Class 6 Maths Chapter 11 Algebra Ex 11.3

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….

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