Subtracting by Counting Up to Ten

The video tutorial teaches subtraction by using friendly numbers, such as tens, to simplify calculations. It begins with an introduction using marbles and explains the concept of friendly numbers. The tutorial clarifies common misunderstandings about the order of subtraction and demonstrates how to use friendly numbers to make subtraction easier. Through examples, it shows how to subtract by counting up to a ten, making the process more intuitive. The lesson concludes with a summary of the key points covered.

What is the relationship between friendly numbers and subtraction?

Explain why 7 minus 3 does not equal 7 minus 4.

How can counting back from a friendly number help in subtraction?

How many marbles did Zim have initially?

What is the result of 19 minus 6?