Mathematics Fractions Procedural 9–10 yrs

Fraction Addition Concepts

分数加法概念

Description

Understand addition and subtraction of fractions as joining and separating parts; decompose a fraction into a sum of fractions with the same denominator in more than one way

Mastery Evidence

✓ Show that 3/8 = 1/8 + 1/8 + 1/8 and also 3/8 = 1/8 + 2/8
✓ Write two different decompositions of 5/6
✓ Use a visual model to justify a decomposition of 2 1/8 into whole-number and fraction parts

Assessment Prompt

If your child has 7/8 of a chocolate bar and gives away 3/8, can they work out what fraction is left — and then show two different ways to split 7/8 into two parts?