Adding Multiple Numbers using Addition Facts and Friendly Numbers

This video tutorial teaches how to add up to four numbers using addition facts and friendly numbers. It begins with an introduction to doubles and friendly numbers, followed by practical examples involving running miles, lifting pounds, and doing situps. The tutorial emphasizes the flexibility of number order in addition and demonstrates how rearranging numbers can simplify calculations.

What is a 'double' in the context of addition facts?

• A number added to itself

• A number multiplied by two

• A number divided by two

• A number subtracted from itself

Which of the following is an example of a friendly number?

• 20

• 9

• 15

• 7

How many miles did the teacher run in total over the week?

• 28 miles

• 26 miles

• 30 miles

• 24 miles

What is the total weight lifted by the teacher?

• 30 pounds

• 32 pounds

• 33 pounds

• 31 pounds

How many sit-ups did the teacher do in total?

• 42 sit-ups

• 43 sit-ups

• 41 sit-ups

• 40 sit-ups