Adding and Subtracting Decimals — Interactive Lesson (Ages 11–14)

Still lining up decimal points incorrectly when adding or subtracting? This substantial 37-slide interactive lesson gives pupils extensive, self-marking practice adding and subtracting decimals accurately.

Mastering Adding and Subtracting Decimals in KS3 Maths

Pupils practise adding and subtracting decimals accurately, building the fluency within the KS3 National Curriculum area of number. Decimal point alignment is a genuinely common source of errors at this stage, and the substantial slide count gives pupils the extensive, varied practice needed to make correct alignment automatic.

What’s Included

• 37-slide interactive lesson on adding and subtracting decimals
• Extensive practice across a substantial number of slides
• Self-marking activities with instant feedback
• Step-by-step guidance on correct decimal point alignment

Key Benefits for Students

• Builds accuracy aligning decimal points correctly every time
• Instant feedback confirms correct working straight away
• Extensive practice across a substantial number of slides
• Reduces a genuinely common source of careless errors
• Strengthens number sense when working with values to several places

Why Teachers Love It

• No prep — ready to use on any interactive whiteboard
• Self-marking format supports independent practice
• Substantial enough to carry a full lesson on this topic
• A thorough single resource for a skill used throughout KS3 number work
• A dependable revision tool whenever decimal accuracy needs a refresh

Love this? You’ll love…

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A strong addition to any KS3 number topic, whether taught as the main lesson introducing decimal addition and subtraction or used for focused revision before later topics assume this fluency is already secure. Getting this genuinely solid now also removes a common source of errors from later percentage and measurement calculations.

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FAQ

What year groups is this for? KS3 (Years 7–9, ages 11–14).

Does it cover both addition and subtraction? Yes, both are covered throughout the lesson.

Is it self-marking? Yes, instant feedback throughout.