ONE WAY TO THINK ABOUT IT
One group changes the view, not the total.
1 × 8 = 8. Show one plate with eight counters: there are still eight altogether.
Try this together
Compare 1 × 8 with 8 × 1 using eight single counters.
Say the complete fact, draw or build its groups, then try it again without the picture. It is fine to return to a known fact when an answer feels uncertain.