• Mastery PD Materials

Using compensation to calculate

Spine 2: Multiplication and Division – Topic 2.25

Introduction

Learn how multiplication and division calculations are affected when one element of the calculation is multiplied or divided by a scale factor.

Teaching points

  • Teaching point 1: For multiplication, if there is a multiplicative change to one factor, the product changes by the same scale factor.
     
  • Teaching point 2: For division, if there is a multiplicative change to the dividend and the divisor remains the same, the quotient changes by the same scale factor.
     
  • Teaching point 3: For division, if there is a multiplicative increase to the divisor and the dividend remains the same, the quotient decreases by the same scale factor; if there is a multiplicative decrease to the divisor and the dividend remains the same, the quotient increases by the same scale factor.

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