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Question 1 - Page 57 - Hundredth - Chapter 3 Class 7 - A peek beyond the Point (Ganita Prakash)
Last updated at June 9, 2025 by Teachoo
Class 7 (Ganita Prakash & Old NCERT)
Chapter 3 Class 7 - A peek beyond the Point (Ganita Prakash)
- Fractions - Quick Revision
- Need for a smaller unit
- Tenth
-
Hundredth
- Figure it out - Page 58
- Decimals
- Fractions to Decimals
- Reading and Writing Decimals
- Unit Conversion - Weight, Length, Money
- Decimal in number line
- Finding greater decimal
- Closest decimal
- Addition and Subtraction of Decimals
- Decimal Sequences
- Estimating Sums and Differences
- More on Decimal System
- Figure it out - Page 78, 79, 80
- Teachoo Questions - MCQs
- Teachoo Questions - Mix
- Teachoo Questions - Assertion Reasoning
- Teachoo Questions - Case Based
Transcript
Question 1 – Page 57 What is the difference: 25 9/10− 6 4/10 7/100 ?These are mixed fractions, converting them into normal fractions 25 9/10=(25 × 10 + 9)/10=259/10=259/10 ×10/10=𝟐𝟓𝟗𝟎/𝟏𝟎𝟎 6 4/10 7/100=6+4/10+7/100=(6 × 100 + 4 × 10 + 7)/100=𝟔𝟒𝟕/𝟏𝟎𝟎 Now, finding difference 𝟐𝟓𝟗𝟎/𝟏𝟎𝟎− 𝟔𝟒𝟕/𝟏𝟎𝟎 Since denominator is same, we subtract numerator 𝟐𝟓𝟗𝟎/𝟏𝟎𝟎− 𝟔𝟒𝟕/𝟏𝟎𝟎 =(2590 − 647)/100 =𝟏𝟗𝟒𝟑/𝟏𝟎𝟎 =(1900 + 43)/100 =1900/100+43/100 =19+43/100 =𝟏𝟗 𝟒𝟑/𝟏𝟎𝟎 =19+40/100+3/100 =19+4/10+3/100 =𝟏𝟗 𝟒/𝟏𝟎 𝟑/𝟏𝟎𝟎
