Add three numbers within 100

~10 min

Combine two numbers that make a friendly ten first.

Friendly ten pair

Friendly ten pair
  • A friendly ten pair is two numbers that add to a multiple of 10, like 10, 20, 30, or 40. Making a ten first can make adding three numbers easier.

A friendly ten pair is two numbers that add to a multiple of 10, like 10, 20, 30, or 40. Making a ten first can make adding three numbers easier.

💡 Look for a number that helps another number reach the next ten.