Free KS1 Maths Worksheets — Addition, Subtraction & Number Bonds (Printable PDFs)

The foundations laid in Key Stage 1 determine how confidently children approach maths throughout primary school and beyond. Years 1 and 2 (ages 5–7) introduce children to the number system, the four operations, basic geometry, and simple measurement. Getting these fundamentals right — not just procedurally but with genuine understanding — matters enormously for everything that follows.

This guide explains what the KS1 maths curriculum covers, what children are expected to master by the end of Year 2, and how to use free printable worksheets to support learning at home or in the classroom.

What Is Covered in KS1 Maths?

The National Curriculum for maths in KS1 covers five main areas:

• Number and place value — counting to 100, understanding tens and units, comparing and ordering numbers
• Addition and subtraction — mental strategies, number bonds, and written methods for two-digit calculations
• Multiplication and division — the 2, 5, and 10 times tables, doubling and halving, equal groups and arrays
• Geometry — identifying and describing 2D and 3D shapes, patterns, position and direction
• Measurement — length, mass, volume, time, and money

At the end of Year 2, children sit the KS1 SATs assessments (in most maintained schools), which test reading, maths, and grammar. The maths assessment covers number (arithmetic paper) and reasoning.

Number and Place Value — The Starting Point

Place value is the cornerstone of the number system. In Year 1, children work with numbers to 100: reading, writing, counting forward and backward, and identifying one more and one less. In Year 2, this extends to numbers to 100 (and beyond for some children), with a focus on partitioning numbers into tens and units.

Understanding that 47 means four tens and seven units — not just "forty-seven" — is what allows children to reason about calculations rather than simply memorising procedures. Children who truly understand place value can work out that 47 + 10 = 57 or that 72 – 20 = 52 by thinking about the tens column, without needing a formal written method.

Common activities that build place value understanding include:

• Representing numbers with tens sticks and unit cubes (Dienes blocks)
• Partitioning and recombining two-digit numbers (42 = 40 + 2)
• Identifying the value of each digit in a two-digit number
• Placing numbers on a number line

Our KS1 maths worksheet library includes place value worksheets covering tens and units for Year 1 and Year 2 levels.

Addition and Subtraction — Building Fluency

Addition and subtraction in KS1 begin with counting objects and using a number line, then progress toward mental strategies and simple written methods. By the end of Year 2, children should be able to:

• Add and subtract two-digit numbers mentally, including crossing the tens boundary
• Recall and use addition and subtraction facts to 20 fluently
• Add three single-digit numbers
• Solve one-step and simple two-step word problems involving addition and subtraction

Number bonds are the essential building block. A child who instantly knows that 7 + 3 = 10 or 13 + 7 = 20 has a tool they can use in every subsequent calculation. Number bond fluency is as important in KS1 as times table fluency is in KS2.

The most common approach to teaching addition and subtraction in Year 1 and Year 2 combines visual representations (number lines, part-whole models), practical resources (counters, cubes), and abstract recording. Worksheets that mirror these representations — rather than jumping straight to abstract number sentences — tend to be more effective at building genuine understanding.

You can find addition and subtraction worksheets for KS1 at beginner and intermediate levels, including number bond practice, crossing-ten calculations, and simple word problems.

Number Bonds — Why They Matter So Much

Number bonds are pairs of numbers that add together to make a given total. In KS1, the key number bonds are those to 10 and to 20.

Children who know their number bonds to 10 instantly — 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5 — have a mental tool they use constantly in maths. Once they know bonds to 10, bonds to 20 follow more quickly (because 14 + 6 = 20 is just 4 + 6 = 10, shifted into the tens column).

The key is automaticity. A child who can work out 7 + 3 with some effort is not in the same position as a child who recalls it instantly. The goal is for number bonds to become as automatic as knowing their own name — available without conscious effort, so attention can go to the problem itself.

Little-and-often practice is the most effective strategy. A daily two-minute number bond drill — oral, flash cards, or a simple worksheet — builds this automaticity over weeks. Speed matters: if a child is pausing for several seconds on 4 + 6, that is a sign they are calculating rather than recalling, and more practice is needed.

Multiplication and Division — Introduction in KS1

Children in KS1 are introduced to the ideas underlying multiplication and division before they learn formal methods. They learn to:

• Count in steps of 2, 5, and 10
• Understand multiplication as repeated addition and grouping
• Understand division as sharing equally and grouping
• Learn the 2, 5, and 10 times tables

The concrete-pictorial-abstract progression is particularly important here. Children first count physical objects arranged in equal groups, then draw arrays (rows and columns of dots), then record as a multiplication number sentence (3 × 4 = 12). Moving too quickly to abstract recording without the pictorial stage is a common cause of confusion.

By the end of Year 2, children should be able to recall all facts in the 2, 5, and 10 times tables — not just count up in steps, but retrieve individual facts quickly (e.g., knowing that 7 × 5 = 35 without counting in fives from zero).

Geometry — Shapes, Patterns, and Position

In KS1, geometry focuses on:

• Identifying and describing common 2D shapes (circle, triangle, square, rectangle, pentagon, hexagon)
• Identifying and describing common 3D shapes (cube, cuboid, sphere, cylinder, cone, pyramid)
• Recognising and creating patterns using shapes and colours
• Describing position using language like "above", "below", "beside", "in front of", "behind", "left", "right"
• Understanding whole, half, and quarter turns

Shape work in KS1 is often taught through sorting and classifying activities. Children compare shapes by the number of sides, the number of corners, whether sides are straight or curved, and whether the shape has faces, edges, and vertices (for 3D shapes).

Measurement — Time, Money, Length, and Mass

Measurement in KS1 covers:

• Length and height — measuring with non-standard and standard units (cm), comparing lengths
• Mass — using balance scales, comparing, and measuring in kg and g
• Capacity — using containers, comparing, and measuring in litres and millilitres
• Time — reading o'clock and half past in Year 1; quarter past and quarter to, five-minute intervals, and days/months/years in Year 2
• Money — recognising coins and notes, finding totals, giving change

Telling the time is often a source of frustration for both children and parents. The key difficulty is the analogue clock, where children must track two different hands moving at different speeds and understand that "quarter past" relates to 15 minutes, not 25. Repeated practice with a real or model clock is more effective than worksheets alone for building this understanding, but worksheets serve well for consolidation once the concept is established.

Using Worksheets Effectively in KS1

For young children, worksheets work best when:

• They are short (5–10 questions) and clearly laid out with plenty of space to write
• They follow on from practical or pictorial activity rather than jumping straight to abstract
• They include a mix of question types rather than 20 identical calculations
• They are used as consolidation, not as the primary method of teaching a new concept

Our KS1 maths worksheet library contains worksheets that are designed with these principles in mind — clear layouts, appropriate question volumes, and answer keys that make home use easy for parents.

You can also generate a custom KS1 maths worksheet, specifying the exact topic and difficulty level. This is particularly useful for targeting a specific skill — for example, addition bridging ten, or reading o'clock and half past times — rather than working through a general mixed worksheet.

Frequently Asked Questions

What should a Year 1 child know by the end of the year?

By the end of Year 1, children should be able to: count reliably to 100 and beyond, read and write numbers to 100, add and subtract single-digit and two-digit numbers using concrete objects and pictures, know number bonds to 10, count in 2s, 5s, and 10s, identify and name common 2D and 3D shapes, and tell the time to the hour and half past.

What should a Year 2 child know by the end of the year?

By the end of Year 2, children should be able to: work with numbers to 100 confidently, add and subtract two-digit numbers mentally (including crossing the tens boundary), recall multiplication and division facts for the 2, 5, and 10 times tables, recognise and use fraction notation for halves, thirds, and quarters, read the time to the nearest five minutes, and recognise coins and notes.

My Year 2 child struggles with carrying in addition. What should I do?

This is very common. The underlying issue is usually a weak understanding of place value. Before drilling column addition, check that your child can confidently say the value of each digit in a two-digit number (e.g., in 46, the 4 is worth forty, not four). Use base-ten blocks or draw tens sticks to make the carrying concrete before moving to abstract recording.

How many worksheets should my child do each week?

Quality and consistency matter more than quantity. Two or three short sessions per week — 10 to 15 minutes each — is more effective than a single long session. Focus on the topics your child finds hardest and vary the format to maintain interest.

Are the worksheets printable?

Yes — all worksheets on Worksheets Generator are designed for A4 print and include clear layouts suitable for children to write on. PDF format ensures they print correctly without any formatting issues.