Lesson over 4.1: https://drive.google.com/file/d/1tuSBGvNQoOUqIwXA7T7TkwAVl94RrW6n/view
Lesson over 4.2: https://drive.google.com/file/d/1D9QHQWTc2HLVmNV5G7nW-YA5dcWGD05Q/view
Lesson over 4.3 and 4.4: https://drive.google.com/file/d/13fK2KGLP4D5FJBYb9kXLvve1f6EujdTU/view
Lesson over 4.5: https://drive.google.com/file/d/1i6bpxI8asX67d10CzSL5Tje_gIKsvlJ8/view
Lesson over 4.6 and 4.8: https://drive.google.com/file/d/1-vjZBPyX09F16DCl0qGdeLchnFF8p7iW/view
Lesson over prime factorization: https://drive.google.com/file/d/1Uy9nP1rpU0ZVKftVAD96A5cnVI5u4gDV/view
Lesson over roots: https://drive.google.com/file/d/1k1QsJ7RNvDuGu36MjKB9r4Gik-q__T64/view
Lesson over comparing real numbers: https://drive.google.com/file/d/1kQCPSlzqCQY4JrqqYT-clBYrI3Zv4364/view