Simplifying Fractions

MathematicsFractionsAges 10–11

Use common factors to simplify fractions to their simplest form; use common multiples to express fractions with a common denominator

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Teaching Table

Set out your lesson

Use common factors to simplify and common multiples to express a pair with a common denominator.

Activity

Ask for common factors of 8 and 12, and common multiples of 3 and 4. If unavailable, revisit mt_FHIAv6dfhU and the vocabulary in mt_vKcxX6iNOA. Check same-factor equivalence first. This activity check is inferred, not a change to canonical edges. Source availability is not learner mastery.

Policy

Check learner readiness directly; prerequisite availability is not attainment.

Instructions

Screen or supplied sheets, pencil and scrap paper are sufficient; no printer, cutting or purchase is required. Read Setup and Show first; use Together with help, then put worked pages, matching cards and adult keys aside for Try. All story quantities are fictional: no cooking, eating, cutting, buying or collection of personal data. Draw any needed counters; no small objects are required. Read text aloud or let the learner point, draw or explain orally. Adult scribing is supported mathematical work, not independent handwriting. Record any hints actually used; never invent a response.

Teaching Procedure

Read the worked model aloud. Ask the learner to identify the whole and equal-part unit. In Together, let them attempt before offering the listed hint. Ask why a method preserves value. If the readiness skill is uncertain, pause and return to the named prerequisite; do not drill unsupported errors. Use fresh Try contexts without the key; after the attempt compare the method as well as the answer.

Record actual responses, access mode and assistance; never invent observations or infer mastery.

Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view. Retain an earlier model only when the current step supplies it as context.

Teaching limits and safe use

These are finite task opportunities, not proof of mastery. Record what was attempted and what support was used.

These finite examples do not establish mastery, age suitability or teaching efficacy. Oral and scribed work can show mathematical reasoning but not independent handwriting. Canonical ages and clauses are preserved; actual readiness must be checked.

Record actual responses, access mode and assistance; never invent observations or infer mastery.

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Use common factors to simplify and common multiples to express a pair with a common denominator.

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Check understanding

Simplify 18/24 to 3/4 by identifying the HCF of 18 and 24
Express 2/3 and 5/8 with a common denominator of 24
Explain why dividing numerator and denominator by a common factor produces an equivalent fraction

“If your child has the fraction 12/16, can they simplify it to its lowest terms — and explain what they divided the top and bottom by?”

Curriculum record

Type: Procedural
Subject: Mathematics
Domain: Fractions
Age range: Ages 10–11