Addition Subtraction within 20 Activities

Halloween themed Year 1 and Year 2 (KS1) maths facts / number bonds within 20 add and subtract mental maths printable activities for independent work, starters, warms ups, early finishers tasks and revision. Help children master addition and subtraction facts with a set of 36 self-check write and wipe trail cards to be laminated for pupils to complete with whiteboard pens, plus a bingo / lotto game. These numeracy activities were designed for Key Stage 1 but could suit KS2 students requiring consolidation. PDF format.

For older or more able children, you might like the same resource in an Addition and Subtraction within 50 version.

SAVE by purchasing these 2 resource packs alongside 2 others as part of my KS1 Mental Maths Activities BUNDLE

Each card contains 14 mental maths calculations - over 500 calculations across the whole set. ALL ANSWERS INCLUDED. They can be used by individuals - or pairs or small groups could race against each other to complete trails accurately. Great for starters, early finishers etc. It promotes speed and accuracy and is a more engaging alternative to worksheets.

Starting at the spider and working their way around in a spiral, children write each answer in the box, creating a running total. The final answer is printed next to the web in the middle of the card so they can see if they have correctly completed it. If not, children can check to see where they have gone wrong.

Answer cards can be used by the children themselves or by the teacher to see mistakes at a glance. Print and laminate if required.

Print and laminate the 6 boards and the calculation cards. Players shuffle cards and put them in a pile to take in turn and check if they have the answer on their board. Different adding and subtracting formats used, including missing numbers within number sentences and addition of 3 single-digit numbers.

You might also be interested in my popular KS1 Literacy resource: KS1 Jumbled Sentences.

Thank you for considering my resources. For engaging, time-saving printables and presentations to help plan Primary Literacy, Maths and French lessons, please visit FullShelf Resources

Save for later
  • Addition-and-Subtraction-within-20..pdf
  • Add-and-Subtract-to-20-Preview1..PNG
  • Add-and-Subtract-to-20-Preview2..PNG
  • Add-and-Subtract-to-20-Preview3..PNG
  • Addition-and-Subtraction-within-20-Bingo..pdf

About this resource


Created: Mar 22, 2017

Updated: Jan 5, 2020


pdf, 543 KB



PNG, 942 KB



PNG, 377 KB


Report a problem

Tes Paid Licence

How can I re-use this?