How can bridging through 10 help me to add and subtract?

Snoot and Fin use bridging through ten to add and subtract shells at the beach.

What is bridging through 10?

Bridging through 10 can help when you add numbers and the answer is more than 10.

Here's what to do:

  • Work out what you need to add to your first number to make ten?

  • Take this from your second number. What do you have left?

  • Add what is left to 10. That's your answer!

Example

7 + 4 = ?

  • Work out 7 + ? = 10 The answer is 3

  • Take this away from your second number. 4 - 3 = 1

  • Add this on. 10 + 1 = 11.

So 7 + 4 = 11

You've just bridged through 10! Well done.

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