Structures: using measures and comparison to understand scaling
Spine 2: Multiplication and Division – Topic 2.17
Primary
KS2
Year 4
Mastery PD Materials
Introduction
Build on segment 2.13 to introduce the scaling structure of multiplication and division; use known multiplication and division strategies to solve problems about scaling/comparison problems.
Teaching points
- Teaching point 1: A longer length can be described in terms of a shorter length using the language of ‘times’; the longer length can be calculated, if the shorter length is known, using multiplication.
- Teaching point 2: A shorter length can be described in terms of a longer length using the language of fractions; the shorter length can be calculated, if the longer length is known, using division.
- Teaching point 3: Other measures can be compared using the language of ‘times’ and fractions, and calculated using multiplication or division.