Detailed Solutions for NCERT Class 7th Mathematics – Chapter 12 – Algebraic Expressions – Exercise – 12.4
1. Observe the patterns of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches or calculators.
If the number of digits formed is taken to be n, the number of segments required to form n digits is given by the algebraic expression appearing on the right of each pattern.
How many segments are required to form 5, 10, 100 digits of the kind , , .6, 4 ,8.
2. Use the given algebraic expression to complete the table of number patterns.
You can find the solutions for previous exercise from here
- Algebraic Expressions – Exercise – 12.3
- Chapter 12 -Algebraic Expressions – Exercise – 12.2
- Algebraic Expressions – Exercise – 12.1
- Perimeter and Area – Exercise – 11.4
- Chapter 11 – Perimeter and Area – Exercise – 11.3
- Perimeter and Area – Exercise – 11.2
- Chapter 11 – Perimeter and Area – Exercise – 11.1
- Chapter 10 – Practical Geometry – Exercise -10.5
- Practical Geometry – Exercise -10.4
- Chapter 10 – Practical Geometry – Exercise -10.3
- Practical Geometry – Exercise -10.2
- Chapter 10 – Practical Geometry – Exercise -10.1
- Chapter 9 – Rational Numbers – 9.2
- Rational Numbers – Exercise – 9.1
- Comparing Quantities – Exercise – 8.3
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