NCERT Maths Mela, Class 4, textbook pages 80–94

How to teach Class 4 Maths Chapter 6, Measuring Length, at home

Metres, centimetres and using a scale, taught with things you already have at home: a 10-minute activity, a game for the week, a 5-day plan and the mistakes to watch for.

05107 cm, measured from 0

NCERT Class 4 Maths Chapter 6 Measuring Length: what it teaches

Length, height, breadth and depth are all lengths. Your child uses half-metre and quarter-metre ropes, learns that 1 metre is 100 centimetres, measures with a scale correctly and estimates lengths before measuring.

Why it matters later. Accurate measuring with a scale is needed for geometry, perimeter and science practicals.

See it: this chapter in pictures

1 m = 100 cm½ m = 50 cm¼ m = 25 cm
Fold the metre rope for half and quarter metres.
0510starts at 1: wrong! Start at 0
Always start from the 0 mark.
lay string along the curve, then measure the string
Use string for curved lines.

You need

  • a 30 cm scale
  • a measuring tape
  • string and a marker
  • objects of different lengths

Tonight’s 10 minutes

  1. Make a 1 m rope, then fold it for ½ m and ¼ m. How many centimetres is each?
  2. Measure a book and a pencil with the scale, starting from 0.
  3. Guess, then measure: your child’s height, the table’s length, a door’s width.
  4. Measure a curved line (like a bangle’s edge) using string, then the scale.

Words to use

  • metre
  • centimetre
  • 100 cm = 1 m
  • length
  • height
  • breadth
  • depth
  • estimate

Watch for

  • Starting measurement from the scale’s edge or from 1. Line up with the 0 mark every time.
  • Mixing units: writing 1 m 50 as 150 m. Say it in words: one metre fifty centimetres is 150 centimetres.

What it sounds like at home

A short example of the conversation. Your words will differ; the questions are what matter.

YouGuess the table’s length.

Your child1 metre.

YouMeasure with the tape.

Your child1 metre and 20 centimetres.

YouHow many centimetres is that?

Your child120.

A game for this week: Guess and measure

  1. Pick five objects.
  2. Each player writes a guess in centimetres.
  3. Measure with a scale.
  4. The closest guess scores a point.

A 5-day plan, 10 minutes a day

  1. Day 1Metre, half and quarter metre ropes.
  2. Day 2Measure with a scale from 0.
  3. Day 3Estimate then measure.
  4. Day 4Measure curved lines with string.
  5. Day 5Guess and measure game.

Everyday moments to practise

  • Buying cloth by the metre.
  • Height chart on the wall.
  • Ruler work in notebooks.
  • Room sizes for furniture.

Quick check

Ask these at the end of the week. Tap to see the answer.

How many cm in 1 m?

100.

How many cm in ½ m?

50.

A table is 1 m 20 cm. How many cm?

120.

Ready for the next chapter when your child…

  • Measures with a scale correctly.
  • Converts metres to centimetres.
  • Estimates lengths sensibly.

Activities, wording and illustrations are Mathify Kids’ own, following the topics of NCERT’s Maths Mela (Class 4). See the full Class 4 parent guide for every chapter.

Questions parents ask

How many centimetres make a metre?

100.

What are length, breadth, height and depth?

All are lengths measured in different directions.

How do I measure a curved line?

Lay a string along it, then measure the string.