You are here
Question 4 - Figure it out (Page 41, 42) - Chapter 2 Class 7 - Arithmetic Expressions (Ganita Prakash)
Last updated at August 21, 2025 by Teachoo
Figure it out (Page 41, 42)
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
- 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 4 Find out the sum of the numbers given in each picture below in at least two different ways. Describe how you solved it through expressions.Left picture ✅ Option 1: Add group-wise Count all 4s: 5 × 4 Count all 8s: 4 × 8 Total sum = 5 × 4 + 4 × 8 = 20 + 32 = 52 ✅ Option 2: Row-wise addition Row 1: 4 + 8 + 4 = 16 Row 2: 8 + 4 + 8 = 20 Row 3: 4 + 8 + 4 = 16 Total sum = 16 + 20 + 16 = 52 Right picture ✅ Option 1: Add group-wise Count all 5s: 5 × 8 Count all 6s: 6 × 8 Total sum = 5 × 8 + 6 × 8 = (5 + 6) × 8 = 11 × 8 = 88 ✅ Option 2: Row-wise addition Row 1: 5 + 6 + 6 + 5 = 22 Row 2: 6 + 5 + 5 + 6 = 22 Row 3: 6 + 5 + 5 + 6 = 22 Row 4: 5 + 6 + 6 + 5 = 22 Total sum = 22 + 22 + 22 + 22 = 88
