Key Stage 3 · Years 7-9 · Number
use approximation through rounding to estimate answers and calculate possible resulting errors expressed using inequality notation a < x ≤ b
Statutory requirement
Pupils should be taught to use approximation through rounding to estimate answers and calculate possible resulting errors expressed using inequality notation a < x ≤ b
Source: Department for Education, National curriculum in England: mathematics programmes of study (Key stage 3). Crown copyright information reproduced under the Open Government Licence v3.0.
ChalkBee reference:
uk-ks3-ma-num-14. The DfE does not assign an official alphanumeric code to KS3 statements; this reference is site-internal.Relevant worksheets
These resources support parts of the requirement. They are not presented as a complete assessment of every clause.
Related teaching units
These existing units provide relevant lesson material. A dedicated unit may still be needed where the requirement is broader.