Maharashtra State Board Class 7th Maths Chapter 5 Operations on Rational Numbers Set 5.1 Solution

Question 1.
Carry out the following additions of rational numbers:

ii. 12/3 +24/5

iii. 11/17 + 13/19

iv. 23/11 + 13/77

Question 2.
Carry out the following subtractions involving rational numbers.

ii. 13/36 – 2/40

iii. 12/3 – 35/6

iv. 41/2 – 31/3

Question 3.
Multiply the following rational numbers.

Question 4.
Write the multiplicative inverse of.

Question 5.
Carry out the divisions of rational numbers:

Intext Questions and Activities

Question 1.
Complete the table given below. (Textbook pg. no. 34)

	-3	3/5	-17	-5/11	5
Natural Numbers	x				✓
Integers	✓
Rational Numbers	✓

Solution:

	-3	3/5	-17	-5/11	5
Natural Numbers	x	x	x	x	✓
Integers	✓	x	✓	x	✓
Rational Numbers	✓	✓	✓	✓	✓

Question 2.
Discuss the characteristics of various groups of numbers in class and complete the table below. In front of each group, write the inference you make after carrying out the operations of addition, subtraction, multiplication and division, using a (✓) or a (x).
Remember that you cannot divide by zero. (Textbook pg. no. 35)

Group of Numbers	Addition	Subtraction	Multiplication	Division
Natural Numbers	✓	x (7- 10 =-3)	✓	x (3÷5=3/5)
Integers
Rational Numbers

Solution:

Group of Numbers	Addition	Subtraction	Multiplication	Division
Natural Numbers	✓	x (7- 10 =-3)	✓	x (3÷5=3/5)
Integers	✓	✓	✓	x (4÷9=4/9)
Rational Numbers	✓	✓	✓	✓