Understanding Negative Subtraction

The video tutorial begins with a recap of the previous lesson, focusing on the 'keep, change, flip' method for solving negative one minus eight. The teacher explains the concept of hidden numbers, using the analogy of a robber to illustrate how some numbers are present but not immediately visible. The method involves keeping the first number, changing subtraction to addition, and flipping the sign of the second number. Practical examples are provided, such as losing money or raspberries, to demonstrate the method's application.

What is the first step in the 'keep, change, flip' method?

• Flip the sign of the second number

• Add both numbers

• Change the subtraction to addition

• Keep the first number as it is

What does the hidden '1' in front of R represent?

• A visible number

• A multiplication factor

• An invisible number like a robber

• A subtraction sign

In the example of losing money, what is the total loss when you lose $1 and then $8?

• $7

• $8

• $9

• $10

How do you change the operation in the 'keep, change, flip' method?

• From addition to subtraction

• From subtraction to addition

• From division to multiplication

• From multiplication to division

What is the result of negative one minus eight using 'keep, change, flip'?

• -10

• -9

• -8

• -7