Rational Numbers MCQ Questions Class 8 Maths Chapter 1
NCERT MCQ Questions for Class 8 Maths Chapter 1 Rational Numbers. Rational Numbers MCQ Questions with Answers from Class 8 Mathematics.
Rational Numbers MCQ Questions Class 8 Maths Chapter 1
Rational Numbers Multiple Choice Questions with Answers Class 8 Maths Chapter 1 PDF is available.
Question 1:
Using appropriate properties find?
-4/3 × 3/2 + 8/3 × 9/2 + 16 =?
(a) -26
(b) 26
(c) 23
(d) -24
Ans:
-4/3 × 3/2 = -2, 8/3 × 9/2 = 12
-4/3 × 3/2 + 8/3 × 9/2 + 16
= -2 + 12 + 16
= 26 (b)
Question 2:
Write additive inverse of -7/13
(a) 7/13
(b) 13
(c) -13
(d) 0
Ans:
(a), 7/13 is the additive inverse -7/13 because
-7/13 + 7/13
= -7+7/13
= 0/13
= 0 (a) 7/13.
Question 3:
Find the multiplicative inverse of -17
(a) +17
(b) 289
(c) -289
(d) -17
Ans:
17 is the multiplicative inverse of -17
17 x (-17)
= -289 (a) +17
Question 4:
Solve (-13/27) × 12/17 = 13/17 × -12/27
(a) -156/459
(b) 156/459
(c) 459/156
(d) -156/289
Ans:
(-13) × 12/27×17
= 13 × (-12)/17 × 27
= -156/459
Question 5:
Multiply 7/13 by the reciprocal of -7/16
(a) -16/13
(b) +16/13
(c) 3/16
(d) -13/16
Ans:
Reciprocal of -7/16 is 16/-7
16/-7 × 7/13
= -16/13 (a)
Question 6:
Fill in the blanks:
______ has no reciprocal.
(a) One
(b) Zero
(c) Two
(d) Three
Ans:
(b) Zero.
Question 7:
13/6 is the reciprocal of ——
(a) 6/13
(b -13/6
(c) -6/13
(d) 0
Ans:
(a) 6/13 is the reciprocal of 13/6
- In case you have missed:- NCERT MCQ Questions for Introduction to graph
Question 8:
Find 2/7 × 7/18 + 4/9 × 9/36 =?
(a) 3/2
(b) 1/3
(c) 2/9
(d) 9/2
Ans:
2/7 × 7/18 + 4/9 × 9/13
= 1/9 + 1/9
= 2/9 (c)
Question 9:
Find 2/13 × 13/16 × 4/5 × 15/16 × ½ =?
(a) 4/89
(b) 2/83
(c) 64/3
(d) 3/64
Ans:
2/13 × 13/16 × 4/5 × 15/16 × 1/2
= 1/8 × 3/4 × ½
= 3/64 (d)
Question 10:
Find 2/5 × (-3/8) + 3/5 × 15/16 – 1/4 =?
(a) 9/13
(b) -13/80
(c) 13/80
(d) 80/13
Ans:
2/5 × -3/8 = -3/20, 3/5 × 15/16 = 9/16
2/5 × -3/8 + 3/5 × 15/16 – -1/4 = -3/20 + 9/16 – 1/4
(c) 13/80 = -192 + 720 – 320/1280
= 208/1280
= 13/80
Question 11:
Find the rational number between 2/3 and 1/2.
(a) -7/12
(b) 7/12
(c) 5/3
(d) 6/3
Ans:
(b) 7/12
(2/3 + ½) ÷ 2
= (4+3/6) ÷2
= 7/6 × ½
= 7/12
7/12 lies between 2/3 and ½
Question 12
Choose rational number greater than -3
(a) -3
(b) -4
(c) -5
(d) -1/2
Ans
(d) -1/2 is the rational number greater than -3.
Question 13:
Represent the -1/3, -2/3, -3/3 on the number line
Question 14:
Write the additive inverse of -6/13
(a) 6/13
(b) 13/6
(c) -13/6
(d) 6/5
Ans:
(a) 6/13 is the additive inverse of -6/13
6/13 + -6/13
= 6-6/13
= 0/13
= 0
Question 15:
Solve -8/9 × 9/16 + 4/30 × 15/16 =?
(a) -3/5
(b) 5/3
(c) 8/3
(d) -3/8
Ans:
(d) -3/8, -8/9 × 9/16 = -1/2
4/30 × 15/16 = 1/8
-8/9 × 9/16 + 4/30 × 15/16
= -1/2 + 1/8
= -4+1/8
= -3/8
- In case you have missed:- Next Chapter MCQ Questions
Your MCQ 3 is wrongly asked of chaper 1 std 8
There should be additive inverse instead of multiplicative inverse