• Mastery PD Materials

Structures: using measures and comparison to understand scaling

Spine 2: Multiplication and Division – Topic 2.17

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.

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