The document Formative Assessment- Rational Numbers Class 8 Notes | EduRev is a part of the Class 8 Course Class 8 Mathematics by VP Classes.

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**Ques 1:** **Match the following:**

Column A | Column B |

(a) The rational number having no reciprocal is: | (i) 1 |

(b) The product of a rational number (other than zero) and its reciprocal is: | (ii) 2 |

(c) The reciprocal of (–1) is: | (iii) 0 |

(d) The product of (–3) and the negative reciprocal of 1(½) is: | (iv) – 1 |

(e) On a number line the rational number equidistant from 0 and –1 is: |

**Ques 2: ****Complete the following crossword puzzle using the given directions.**

**Across:**

(1) The negative of a rational number is called its ___________.

(2) A number of the form p/q, where p and q are integers and q ≠ 0, is called a ______.

**Down:**

(3) The __________ of a rational number and its reciprocal is 1.

(4) The multiplicative inverse of a number is also called its__________.

(5) Zero is also called the __________identity for rational numbers.

(6) If the product of two rational numbers is 1, then they are called multiplicative __________of each other.

(7) The rational number __________is the additive identity for rational numbers.

**Ques 3:** **Choose the correct answer for each of the following:**

**(i) The sum of **

(a) 0

(b) 1

(c) 2/9

(d) -2/9

**(ii) The product of **

(a) 0

(b) 1

(c) 1/25

(d) -1/25

**(iii) The multiplicative inverse of 1/6 is _____________**

(a) – 6

(b) 6

(c)

(d) 1**(iv) The rational number equivalent to 9/-81 is :**

(a) 18/162

(b) -81/162

(c)

(d) 1/9**(v) 0 reduced by 1/2 is**

(a) 1/2

(b)

(c) 2

(d) – 2

**Ques 4:**** (i) Which of 0 or 1 is the multiplicative identity for rational numbers?(ii) Which of 0 or 1 is the additive-identity for rational numbers?(iii) Is 0 a rational number?(iv) How many rational numbers can exist between 0 and –1?(v) Is a rational number the quotient of two integers such that the denominator is a non-zero integer?(vi) Is there any rational number which when multiplied by 0 gives 1?(vii) Which rational numbers are their own reciprocals?(viii) Do ‘a - 0’ and ‘a - 0’ represent the same rational number?(ix) Is there a rational number that is equal to its negative? If yes, write it.(x) What is the reciprocal of the reciprocal of 1/2 ?**

**ANSWERS:**

**1.** (a) → (iii)

(b) → (i)

(c) → (iv)

(d) → (ii)

(e) → (v)

**2.** (1) → ADDITIVE-INVERSE

(2) → RATIONAL-NUMBER

(3)→PRODUCT

(4) → RECIPROCAL

(5) → ADDITIVE

(6) → INVERSE

(7) → ZERO

**3.** (i) (d)

(ii) (d)

(iii) (b)

(iv) (c)

(v) (b)

**4.** (i) 1

(ii) 0

(iii) Yes

(iv) Unlimited

(v) Yes

(vi) No

(vii) 1 and –1

(viii) No

(ix) Yes, 0

(x) 1/2

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