Detailed Solutions for NCERT Class 6 Mathematics – Chapter 11 – Algebra – Exercise – 11.3
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:
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
Answer:
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:
(b) 17y, y/17 , 5 z
(c) 2y + 17, 2 y – 17
(d) 7 m, – 7 m + 3, – 7 m – 3
4. Give expressions for the following cases.
(a) 7 added to p (b) 7 subtracted from p (c) p multiplied by 7 (d) p divided by 7 (e) 7 subtracted from – m (f) – p multiplied by 5 (g) – p divided by 5 (h) p multiplied by – 5
Solution:
5. Give expressions in the following cases.
(a) 11 added to 2m (b) 11 subtracted from 2m (c) 5 times y to which 3 is added (d) 5 times y from which 3 is subtracted (e) y is multiplied by – 8 (f) y is multiplied by – 8 and then 5 is added to the result (g) y is multiplied by 5 and the result is subtracted from 16 (h) y is multiplied by – 5 and the result is added to 16.
Solution:
6. (a) Form expressions using t and 4. Use not more than one number operation. Every expression must have t in it.
Solution:
(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:
You can find the solutions for Class 6 Mathematics previous exercises from here
- Chapter 11 – Algebra – Exercise 11.2
- Algebra – Exercise 11.1
- Chapter 10 – Mensuration – Exercise 10.3
- Mensuration – Exercise 10.2
- Chapter 10 – Mensuration – Exercise 10.1
- Data Handling – Exercise 9.4
- Chapter 9 – Data Handling – Exercise 9.3
- Data Handling – Exercise 9.2
- Chapter 9 – Data Handling – Exercise 9.1
- Chapter 8 – Decimals – Exercise – 8.6
- Decimals – Exercise – 8.5
- Chapter 8 – Decimals – Exercise – 8.4
- Decimals – Exercise – 8.3
- Chapter 8 – Decimals – Exercise – 8.2
- Decimals – Exercise – 8.1
- Fractions – Exercise – 7.6
- Chapter 7 – Fractions – Exercise – 7.5
- Fractions – Exercise – 7.4
- Chapter 7 – Fractions – Exercise – 7.3
- Fractions – Exercise – 7.2
- Chapter 7 – Fractions – Exercise – 7.1
- Integers – Exercise – 6.3
- Chapter 6 – Integers – Exercise 6.2
- Integers – Exercise 6.1
- Understanding Elementary Shapes – Exercise 5.9
- Chapter 5 – Understanding Elementary Shapes – Exercise 5.8
- Understanding Elementary Shapes – Exercise 5.7
- Chapter 5 – Understanding Elementary Shapes – Exercise 5.6
- Understanding Elementary Shapes – Exercise 5.5
- Chapter 5 – Understanding Elementary Shapes – Exercise 5.4
- Understanding Elementary Shapes – Exercise 5.3
- Chapter 5 – Understanding Elementary Shapes – Exercise 5.2
- Understanding Elementary Shapes – Exercise 5.1
- Chapter Basic Geometrical Ideas – Exercise 4.6 Solutions
- Basic Geometrical Ideas – Exercise 4.5 Solutions
- Chapter 4 Basic Geometrical Ideas – Exercise 4.4 Solutions
- Basic Geometrical Ideas – Exercise 4.3 Solutions
- Chapter 4 Basic Geometrical Ideas – Exercise 4.2 Solutions
- Basic Geometrical Ideas – Exercise 4.1 Solutions
- Playing with Numbers – Exercise 3.7 Solutions
- Chapter 3 Playing with Numbers – Exercise 3.6 Solutions
- Playing with Numbers – Exercise 3.5 Solutions
- Chapter 3 Playing with Numbers – Exercise 3.4 Solutions
- Playing with Numbers – Exercise 3.3 Solutions
- Chapter 3 Playing with Numbers – Exercise 3.2 Solutions
- Playing with Numbers – Exercise 3.1 Solutions
- Whole Numbers – Exercise 2.3 Solutions
- Chapter 2 Whole Numbers – Exercise 2.2 Solutions
- Whole Numbers – Exercise 2.1 Solutions
- Knowing Our Numbers Solutions Exercise 1.3 Solutions
- Chapter 1 Knowing Our Numbers Solutions Exercise 1.2 Solutions
- Knowing Our Numbers Solutions Exercise 1.1 Solutions
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