These Year 5 Adding Near Multiples of 10 worksheets help pupils develop efficient mental calculation strategies by adjusting numbers close to multiples of ten.

Instead of using formal written methods, pupils learn to calculate more quickly by rounding to the nearest multiple of 10 and then adjusting the answer. This approach strengthens number sense and builds confidence with larger numbers.

For example:

234 + 9

Think: 234 + 10 = 244

Then adjust: 244 − 1 = 243

This strategy allows pupils to solve calculations quickly and efficiently while deepening their understanding of number relationships.

These worksheets are ideal for developing flexible mental maths skills in Key Stage 2 and support preparation for both SATs arithmetic tests and NAPLAN mental maths questions.

Differentiation

This resource includes three differentiated worksheets to support a wide range of learners.

Triangles (Support Level)

Pupils add numbers such as +9, +11, +19 and +21 to three-digit numbers. These questions focus on making small adjustments of 1 when rounding to the nearest multiple of ten.

Circles (Core Level)

Pupils add near multiples such as +39, +41, +49 and +51 to four-digit numbers. This requires greater mental flexibility and reinforces rounding and adjustment strategies with larger numbers.

Squares (Challenge Level)

Includes more demanding calculations such as +49, +51, +59 and +61 with four-digit numbers. Pupils must make larger adjustments and apply the near-multiple strategy efficiently.

What’s Included

• 3 differentiated worksheets (Triangles, Circles, Squares)

• 18 questions per worksheet

• Answer sheets included

• QR code linked to a strategy video

• Printable PDF format

Ideal For

• Year 5 maths lessons

• KS2 homework

• Mental maths fluency practice

• SATs arithmetic preparation

• NAPLAN maths practice

• Independent learning or small group work