Elementary Mathematics

Adding:https://www.mathsisfun.com/numbers/bases.html

Subtracting: https://www.youtube.com/watch?v=2s5N2FUIAZc

http://www.math.com/school/subject1/lessons/S1U1L11GL.html

Number Line

http://www.math.com/school/subject1/lessons/S1U1L11GL.html

Repeated Addition

https://www.youtube.com/watch?v=j5c6pqAP2IA

Chip Method

https://www.youtube.com/watch?v=l6MKcyuqUYs

Multiplying:https://www.youtube.com/watch?v=7rb6ewezE3k

Dividing:https://www.youtube.com/watch?v=c0WBNFCPx8U

Dividing... BIG 7!

https://www.youtube.com/watch?v=Zyn2yALYkK8

https://www.youtube.com/watch?v=K_tPbVPfHgk

Divisibility Rules

https://www.mathsisfun.com/divisibility-rules.html

Chip Method

https://www.youtube.com/watch?v=yVwbaEPedys

Adding/Subtracting

https://www.youtube.com/watch?v=5juto2ze8Lg

Multiplying/ Dividing

https://www.youtube.com/watch?v=T3D9z6lUldM

Improper and Mixed Numbers

https://www.mathsisfun.com/improper-fractions.html

https://www.youtube.com/watch?v=qk2oP6FZ6HA

Fractions to Decimals

https://www.mathsisfun.com/converting-fractions-decimals.html

https://www.youtube.com/watch?v=ujEGPx_BlNU

https://www.youtube.com/watch?v=eq1vDQAZrfk&t=2s

Expanded Notation

https://www.youtube.com/watch?v=GjGoqqGYRjo