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Length Conversion
Last updated at June 10, 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
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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
Length Conversion Converting mm to cm Convert 4 mm in cm 4 mm = 4 × 1 mm = 4 × 1/10 cm = 4/10 cm = 04/10 cm = 0.4 cm ∴ 4mm = 0.4 cm So, 10 mm = 1 cm 1 mm = 1/10 cm As 10 mm = 1 cm 1 mm = 1/10 cm Converting cm to m 100 cm = 1 m 1 cm = 1/100 m Convert 29 cm into m 29 cm = 29 × 1 cm = 29 × 1/100 m As 100 cm = 1 m 1 cm = 1/100 m = 29/100 m = 029/100 m = 0.29 m Converting m to km 1000 m = 1 km 1 m = 1/1000 km Convert 19 m into km 19 cm = 19 × 1 m = 19 × 1/1000 km = 19/1000 km = 0019/1000 km = 0.019 km Convert 1899 m into km 1899 m = 1899 × 1 m = 1899 × 1/1000 km = 1899/1000 km = 1.899 km
