My son took 4th grade math while in 2nd grade. They did have timed test. 100 in 5 minutes. This was multiplication, division, addition and subtraction. The teacher gave a test a week starting with addition. The numbers were also 1 - 12 and you had to get 100%.
This kind of worried me a bit with the subject acceleration.
Division was by far the hardest. But he got them all with a couple weeks to spare.
Everyone that got all at 100% and on time were treated to ice cream with the principal.
My son said a lot of kids didn't get them all.
Then in 5th grade the first week they took the timed tests again. I am sure they did addition and subtraction in 2nd and 3rd grade too. Just not so many.
My son hates these type of test. He kind of rebels against them till they really count.