Mathematics
Measurement
Procedural
7–8 yrs
Comparing lengths by measuring
通过测量比较长度
Description
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit
Mastery Evidence
- 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?'
Assessment Prompt
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?
