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Chapter 3 | Rational Numbers as Decimals | Class-7 DAV Secondary Mathematics
Unit 3 Worksheet 2 || Rational Numbers as Decimals
1. Express the following rational numbers as decimals by using long division method.
Answers:
2. Without actual division, determine which of the following rational numbers have a terminating decimal representation and which have a non-terminating decimal representation.
Answers:
3. Find the decimal representation of the following rational numbers.
Answers:
4. If the number 1/2+2/3+3/4+4/5 is expressed as a decimal, will It be terminating or non-terminating? terminating? Justify your answer.
Answer 4:
5. Justify the following statements as True or False.
(i) 22/7 can be represented as a terminating decimal.
Answer (i): False (22/7 is non terminating)
(ii) 51/512 can be represented as a terminating decimal.
Answer (ii): True
(iii)19/45 can be represented as a non-terminating repeating decimal.
Answer (iii): True
(iv) 3/17 cannot be represented as a non-terminating repeating decimal.
Answer (iv): False (3/17 is non terminating)
(v) If 3/2 and 7/5 are terminating decimals, then 3/2 + 7/5 is also a terminating decimal.
Answer (v): True
(vi) If 1/4 and 1/5 both have terminating decimal representation, then 1/4*1/5 also has a terminating decimal representation.
Answer (vi): True
- Chapter 1 Rational Numbers | Class-7 DAV Secondary Mathematics
- Chapter 2 Operations on Rational Numbers | Class-7 DAV Secondary Mathematics
- Chapter 3 Rational Numbers as Decimals | Class-7 DAV Secondary Mathematics
- Chapter 4 Exponents and Powers | Class-7 DAV Secondary Mathematics
- Chapter 5 Application of Percentage | Class-7 DAV Secondary Mathematics
- Chapter 6 Algebraic Expressions | Class-7 DAV Secondary Mathematics
- Chapter 7 Linear Equations in One Variable | Class-7 DAV Secondary Mathematics
- Chapter 8 Triangle and Its Properties | Class-7 DAV Secondary Mathematics
- Chapter 9 Congruent Triangles | Class-7 DAV Secondary Mathematics
- Chapter 10 Construction of Triangles | Class-7 DAV Secondary Mathematics
- Chapter 11 Perimeter and Area | Class-7 DAV Secondary Mathematics
- Chapter 12 Data Handling | Class-7 DAV Secondary Mathematics
- Chapter 13 Symmetry | Class-7 DAV Secondary Mathematics
- Chapter 14 Visualising Solids | Class-7 DAV Secondary Mathematics