We work on our multiplication and division facts daily in school and test our skills once a week with our Monkey Mental Maths Challenges.
Year 3 need to know multiplication and division facts for the 3x 4x and 8x tables up to 12.
Year 4 need to know all the multiplication and division facts up to 12 x 12
We have done a lot of work on addition and subtraction, multiplication and division, learning the formal methods, but thinking about when it is appropriate to use formal column methods and when we could use mental methods, with jottings or empty number lines instead. We don't need a sledgehammer to crack a nut!
For example we can find 4x something by doubling and doubling again.