Chapter 5 Operations on Rational Numbers Set 5.1

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Chapter 5 Operations on Rational Numbers Set 5.1

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


Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 1

ii. 12/3 +24/5
Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 2

iii. 11/17 + 13/19
Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 3

iv. 23/11 + 13/77
Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 4

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

Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 5

ii. 13/36 – 2/40
Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 6

iii. 12/3 – 35/6
Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 7

iv. 41/2 – 31/3
Maharashtra Board Class 7 Maths Solutions Chapter 5 Operations on Rational Numbers Practice Set 22 8

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