Year 3

Addition KS2, Year 3 Maths. Addition explained through worksheets, websites, and games for primary school children learning Key Stage 2. Homework help with number trios and adding multiple-digit numbers.

Number Trios

If you know an addition fact, you can work out a related subtraction fact. Learning number trios are very useful.

The numbers 11, 4, 7 can be made into these four sums by just swapping the two lower numbers.

4 + 7 = 11               11 – 4 = 7
7 + 4 = 11               11 – 7 = 4

This can be done with many other numbers.

Hands onUse your flashcards to play a game. Pick three numbers, two of which add up to the third one. Then try and create four sums using only the plus, minus and equals.

Number flashcards to 50
Maths symbols flashcards.
Number Trio Worksheet
Test what you have learnt.
Pole ClimberPole Climber
Answer the the questions quickly to get the climber to the top of the pole.

Adding multiple-digit numbers

 Carrying over

Addition by splittingAddition by splitting
Add the numbers by splitting them and then adding them together.


Number Pairs to 20Number Pairs to 20
Repair the slide by adding the numbers that make 20.
Number Pairs to 20Bargin Hunt
Add up the bargin quickly.
Conveyor Belt AdditionConveyor Belt Addition
Add up your shopping.