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Published on: 16/06/2021
QB365 provides detailed and simple solution for every book back questions in class 7 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 7th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
Find the value of :
(i) (-11) - (-33)
(ii) (-90)-(-50)
2.
(i) Subtract (−40) from 70
(ii) Subtract (-12) from (-20)
3.
Subtract the following using the number line.
(i) –3 – (–2)
(ii) +6 – (–5)
4.
What is the balance in Chezhiyan’s account as a result of a purchase for Rs. 1079, if he had an opening balance of Rs. 5000 in his account?
5.
Chitra has Rs.150. She wanted to buy a bag which costs Rs. 225. How much money does she need to borrow from her friend?
1.
(i) (-11) - (-33)
= (-11) + (+33)
= 22
(ii) (-90)-(-50)
= -90 - (-50)
= -90 + 50
= -40
2.
(i) 70 - (-40)
= 70 + (additive inverse of−40)
= 70 + 40
= 110
(ii) (-20 )- (-12)
= (-20) + (additive inverse of (-12))
= (-20) + 12
= -8
3.
(i) –3 – (–2)
To subtract –2 from –3 using number line,
Therefore, –3 – (–2) = –3 + 2 = –1
(ii) +6 – (–5)
To subtract –5 from 6 using number line,
.JPG)
Therefore, +6 – (–5) = +6 + 5 = 11.
Now, let us see how to subtract negative integers using additive inverse.
4.
Opening balance = Rs. 5000
Debit amount = Rs. 1079 (−)
Balance amount
= Rs. 3921
5.
Amount with Chitra = Rs. 150
Cost of bag = Rs. 225
Amount to be borrowed = Rs. 225 − Rs. 150
= Rs. 75
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Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
