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Step-by-step practice Maths textbook

Chapter 5: Adding within 20

  • Strand Addition
  • Level Level 2
  • Practice 105 questions with step-by-step solutions

Step-by-step practice: maths (Level 2). Small steps, repeated until fluent. Content: Add two numbers with a total up to 20 by counting on from the bigger number, Make 10 first to add numbers that go past 10, Add a 1-digit number to a 2-digit number up to 20, Add zero, and see that adding zero does not change a number, Write number sentences with + and =, and find missing numbers.

Open Level 2 chapter

By the end of this chapter you will be able to

  • Count on to add
  • Make 10 to help with adding
  • Add a 1-digit number to a 2-digit number
  • Know that adding zero does not change a number
  • Write and complete number sentences

You should already know

  • Number bonds to 10 (Level 1)
  • Number bonds to 20 (Chapter 4)
  • Tens and ones (Chapter 2)

Where this leads

  • Taking away within 20 (Chapter 6)
  • Adding and subtracting within 100 (Chapter 7)

Lessons in this chapter

  1. 5.1 Counting on to add
  2. 5.2 Making 10 first
  3. 5.3 Adding a 1-digit number to a 2-digit number
  4. 5.4 Adding zero
  5. 5.5 Number sentences
  6. Summary and key words
  7. Check-up and practice test questions

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