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Question 5 - Tinker the Terms - I - Chapter 2 Class 7 - Arithmetic Expressions (Ganita Prakash)
Last updated at May 26, 2025 by Teachoo
Class 7 (Ganita Prakash & Old NCERT)
Chapter 2 Class 7 - Arithmetic Expressions (Ganita Prakash)
- Simple Expressions
- Comparing Expressions
- Comparing Expressions without fully calculating
- Reading and Evaluating Complex Expressions
- Terms in Expressions
- Swapping and Grouping (Commutative & Associative Properties)
- Writing expressions from story
- Figure it out - Page 34
- Removing Brackets - I
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Tinker the Terms - I
- Removing Brackets - II
- Tinker the Terms - II
- Figure it out (Page 41, 42)
- Figure it out (Page 42, 43, 44)
Transcript
Question 5 Add brackets at appropriate places in the expressions such that they lead to the values indicated. (a) 34 – 9 + 12 = 13 Without brackets: 34 – 9 + 12 = 37 ❌ Trying adding brackets: 34 – (9 + 12) = 34 – 21 = 13 ✅ ∴ Answer (a): 34 – (9 + 12) = 13 Question 5 Add brackets at appropriate places in the expressions such that they lead to the values indicated. (b) 56 – 14 – 8 = 34 Without brackets: 56 – 14 – 8 = 34 ✅ This already works as written. ✅ Answer (b): (56 – 14) – 8 = 34 (or just leave as is: 56 – 14 – 8 = 34) Question 5 Add brackets at appropriate places in the expressions such that they lead to the values indicated. (c) –22 – 12 + 10 + 22 = – 22 Since sum is –22 We will try to make the last three terms 0 Adding brackets –22 – (12 + 10) – 22 = –22 + 22 – 22 = – 22 Answer (c) –22 – (12 + 10) + 22 = –22 ✅
