Addition and Subtraction Within 20

Free worksheets, games, songs and resources to support children learning to add and subtract numbers up to 20.
Adding 1 (within 20) Mad Maths Minutes

Mad Maths Minutes

Adding 1 (within 20)

Subtracting 1 (within 20) Mad Maths Minutes

Mad Maths Minutes

Subtracting 1 (within 20)

Adding/Subtracting 1 (within 20) Mad Maths Minutes

Mad Maths Minutes

Adding/Subtracting 1 (Within 20)

one more / one less (within 20) Mad Maths Minutes

Mad Maths Minutes

One more/one less (within 20)

Make 20 Mad Maths Minutes

Mad Maths Minutes

Make 20

Subtract from 20 Mad Maths Minutes

Mad Maths Minutes

Subtract from 20

Add 1-digit to 10 Mad Maths Minutes

Mad Maths Minutes

Add a 1-digit number to 10

Addition (within 20) Crossing 10 Mad Maths Minutes

Mad Maths Minutes

Addition (within 20) crossing 10

Subtraction (within 20) Crossing 10 Mad Maths Minutes

Mad Maths Minutes

Subtraction (within 20) crossing 10

Addition (within 20) Mad Maths Minutes

Mad Maths Minutes

Addition (within 20)

Subtraction (within 20) Mad Maths Minutes

Mad Maths Minutes

Subtraction (within 20)

Add 1-digit to 10 Interactive Game

Add 1-Digit to 10 Interactive

Set your chosen time and see how many adding 1-digit to 10 questions you can answer.

Alien Attack Thumb

Addition (within 20) Crossing 10 Alien Attack

Emulated old Flash game. Not fully supported but seems to run OK. PC only.

Alien Attack Thumb

Subtraction (within 20) Crossing 10 Alien Attack

Emulated old Flash game. Not fully supported but seems to run OK. PC only.

Alien Attack Thumb

Add 3 numbers (doubles) Alien Attack

Emulated old Flash game. Not fully supported but seems to run OK. PC only.

Alien Attack Thumb

Add 3 numbers (make 10) Alien Attack

Emulated old Flash game. Not fully supported but seems to run OK. PC only.