Comparing lengths by measuring
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit
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Teaching Table
Set out your lesson
“If a pencil is 16 cm and a crayon is 9 cm, can your child work out how much longer the pencil is — without measuring them side by side?”
Full guide and materials
- Activity. Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit
What to notice. Measure two objects and calculate the difference in length • Express the difference using the correct unit (e.g. '7 cm longer') • Solve a comparison problem: 'How much taller is the bookshelf than the desk?'
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1 approach
If a pencil is 16 cm and a crayon is 9 cm, can your child work out how much longer the pencil is — without measuring them side by side?
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit
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Check understanding
- Measure two objects and calculate the difference in length
- Express the difference using the correct unit (e.g. '7 cm longer')
- Solve a comparison problem: 'How much taller is the bookshelf than the desk?'
“If a pencil is 16 cm and a crayon is 9 cm, can your child work out how much longer the pencil is — without measuring them side by side?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Measurement
- Age range
- Ages 7–8
Standards