OK, so your students are pretty good at their times tables. Completing them in under 2 mins - and of course, you see this on the records you have kept on the record sheet :)
So, what's next?
The extension sheet multiples the multiplier by either 10 or 0.1
So if the student knows that 4 x 4 = 16,
then they should also know quickly that 4 x 0.4 = 1.6 and that 4 x 40 = 160
This sheet tests that. Use the same recording sheet and make sure you note it is for the extension.
Have fun and please do leave some feedback.