KS1 Maths textbook

Year 1 Numbers to 20: lesson and practice

Strand Number
Level Year 1
Practice 88 questions with step-by-step solutions

National Curriculum for England, Key Stage 1 mathematics, Year 1. Content: Count to and across 20, forwards and backwards, Count objects up to 20, Read and write numbers 11 to 20 as numerals and as words, Tens and ones with ten frames, One more and one less to 20, Use the number line to 20, Compare and order numbers to 20.

Open Year 1 chapter

By the end of this chapter you will be able to

Count forwards and backwards to 20
Read and write the numbers 11 to 20 as numerals and as words
Say how many tens and ones are in a number to 20, using a ten frame
Say the number that is one more or one less, up to 20
Count on and back along a number line to 20
Say which of two numbers to 20 is bigger, and put them in order

You should already know

Numbers 0 to 10 and their words (Chapter 1)
Counting on and back within 10 (Chapter 1)
Adding and subtracting within 10 (Chapter 2)

Where this leads

Adding and subtracting within 20 (Chapter 5)
Numbers to 100 (Chapter 6)

Lessons in this chapter

Read the whole chapter on one page (good for printing).

Practise with real exam questions

The DfE publishes the old KS1 tests, with mark schemes, for free. They are optional for schools now, so use them as extra practice.

KS1 Maths past papers