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Question 3 - 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 3 Find the values of the following expressions. For each pair, first try to guess whether they have the same value. When are the two expressions equal? (a) (6 + 10) – 2 and 6 + (10 – 2) Solving each separately (6 + 10) – 2 = 6 + 10 – 2 = 16 – 2 = 14 6 + (10 – 2) = 6 + 8 = 14 So, both expressions are equal Question 3 Find the values of the following expressions. For each pair, first try to guess whether they have the same value. When are the two expressions equal? (b) 16 – (8 – 3) and (16 – 8) – 3 Solving each separately 16 – (8 – 3) = 16 – 5 = 11 (16 – 8) – 3 = 8 – 3 = 5 So, both expressions are not equal Question 3 Find the values of the following expressions. For each pair, first try to guess whether they have the same value. When are the two expressions equal? (c) 27 – (18 + 4) and 27 + (–18 – 4) Solving each separately 27 – (18 + 4) = 27 – 22 = 5 27 + (–18 – 4) = 27 – (18 + 4) = 27 – 22 = 5 So, both expressions are equal
