Year 6 Mental Addition Worksheets – Large Numbers, Decimals and Word Problems
➕ Build confident and efficient mental addition skills!
Help Year 6 learners strengthen their mental maths with this engaging set of printable addition worksheets. Pupils practise adding large whole numbers, decimals, money and measurements before applying their skills to real-life word problems.
The questions encourage children to choose efficient mental strategies such as rounding and adjusting, partitioning, bridging and recognising number relationships.
📚 What’s included?
3 printable Year 6 mental addition worksheets
3 complete answer sheets for quick and easy marking
15 large-number addition calculations
20 decimal addition calculations
12 addition word problems
Questions involving whole numbers, decimals, money and metric measurements
Clear instructions and spacious answer areas
Helpful QR links to supporting instructional videos
6 A4 pages in total
🧠 Skills covered
Children will practise:
Mentally adding five-digit numbers
Adding decimals with different numbers of decimal places
Adding amounts of money
Adding metric measurements, including kilometres, kilograms, millimetres and centimetres
Using rounding and adjustment
Partitioning numbers into manageable parts
Selecting efficient mental calculation strategies
Identifying important information in written problems
Applying addition skills in practical contexts
🎯 Perfect for
🇦🇺 NAPLAN preparation
These worksheets provide useful practice for the mental calculation, number fluency and problem-solving skills that support Year 6 learners preparing for NAPLAN-style numeracy questions.
🇬🇧 KS2 SATs preparation
The activities are also ideal for UK Year 6 pupils revising mental arithmetic, decimal addition and mathematical reasoning in preparation for KS2 SATs.
⭐ Why teachers and parents will love this resource
No preparation required—simply print and use
A clear progression from calculations to applied problems
A varied mixture of whole numbers and decimals
Real-life contexts make addition more meaningful
Complete answer sheets save valuable marking time
Suitable for classroom, homework and home-learning use
Fun illustrations help make maths practice feel more approachable
📄 Resource format
This resource is supplied as a printable PDF containing 6 A4 pages. It includes three student worksheets and three corresponding answer sheets.
Give your learners purposeful mental addition practice while building the confidence and flexibility they need to solve calculations efficiently!
This is an independently created educational resource and is not affiliated with or endorsed by NAPLAN, ACARA or the UK Standards and Testing Agency.
Year 6 Mental Addition Worksheets – Large Numbers, Decimals and Word Problems
➕ Build confident and efficient mental addition skills!
Help Year 6 learners strengthen their mental maths with this engaging set of printable addition worksheets. Pupils practise adding large whole numbers, decimals, money and measurements before applying their skills to real-life word problems.
The questions encourage children to choose efficient mental strategies such as rounding and adjusting, partitioning, bridging and recognising number relationships.
📚 What’s included?
3 printable Year 6 mental addition worksheets
3 complete answer sheets for quick and easy marking
15 large-number addition calculations
20 decimal addition calculations
12 addition word problems
Questions involving whole numbers, decimals, money and metric measurements
Clear instructions and spacious answer areas
Helpful QR links to supporting instructional videos
6 A4 pages in total
🧠 Skills covered
Children will practise:
Mentally adding five-digit numbers
Adding decimals with different numbers of decimal places
Adding amounts of money
Adding metric measurements, including kilometres, kilograms, millimetres and centimetres
Using rounding and adjustment
Partitioning numbers into manageable parts
Selecting efficient mental calculation strategies
Identifying important information in written problems
Applying addition skills in practical contexts
🎯 Perfect for
🇦🇺 NAPLAN preparation
These worksheets provide useful practice for the mental calculation, number fluency and problem-solving skills that support Year 6 learners preparing for NAPLAN-style numeracy questions.
🇬🇧 KS2 SATs preparation
The activities are also ideal for UK Year 6 pupils revising mental arithmetic, decimal addition and mathematical reasoning in preparation for KS2 SATs.
⭐ Why teachers and parents will love this resource
No preparation required—simply print and use
A clear progression from calculations to applied problems
A varied mixture of whole numbers and decimals
Real-life contexts make addition more meaningful
Complete answer sheets save valuable marking time
Suitable for classroom, homework and home-learning use
Fun illustrations help make maths practice feel more approachable
📄 Resource format
This resource is supplied as a printable PDF containing 6 A4 pages. It includes three student worksheets and three corresponding answer sheets.
Give your learners purposeful mental addition practice while building the confidence and flexibility they need to solve calculations efficiently!
This is an independently created educational resource and is not affiliated with or endorsed by NAPLAN, ACARA or the UK Standards and Testing Agency.
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