Remember: use the pieces as you choose to or not.
Not using the pieces is fine: it means you’ve already built a library of pictures in your mind – OR that you’ve already mastered the concepts and skills of operations with positive and negative numbers.
Using the pieces is also fine: it means you’re building up a library of pictures in your mind that will make you better at math.
Use the pieces – or not – as you see fit.
Lesson 56.037 Multiply Positive & Negative Numbers 1.1
Followup to Lesson
Suggestion: watch this video with your parents, and push “pause” when I mention that. So play, pause, discuss, then play again.