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.
Use 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.
Maths symbols flashcards.
Test what you have learnt.
Answer the the questions quickly to get the climber to the top of the pole.
Adding multiple-digit numbers
Add the numbers by splitting them and then adding them together.
Repair the slide by adding the numbers that make 20.
Add up the bargin quickly.
Add up your shopping.