"Clouds I agree with you except --
"there isn't any difference if someone has to chant through the whole table, and someone who has to calculate/add. People seem to think that chanting automatically produces the ability to know individual facts instantly and randomly, and it doesn't necessarily"
only 2 4 6 8 has this disadvantage
7 8s are 56 does not"
Yes, if they have practised so that they can actually say "7 8s are 56", that's perfect. But some who chant/sing etc have learned them almost as a song, where they can just go to any line of the song at will, but have to go through the whole thing to get there, which is as long (or longer) as calculating from a nearby known table.
But if they have practised with random tests, or if they have chanted in such a way that they CAN just get to any fact, then that's what's wanted. It's the instant access, however you get there. Chanting (if done right) can lead to that (as can other memory methods).
Nothing wrong with the quick calculations either, for the people who are good at maths, understand what they're doing, get really quick at it, have it as a fall back, haven't been able to learn the tables despite practice, etc. But it doesn't mean that most children won't benefit from at least trying to learn them from memory, in addition to some of the other strategies. The quick calculation methods are also very good for ensuring that children understand what they are doing and how multiplication works. If a child wants to quickly know 13x3, and can start at 10x3 and then continue 33, 36, 39, that shows a good understanding of how it works. So they are very useful methods to know AS WELL. It doesn't have to be either/or (for most children; obviously there are some who will learn by rote and never understand, and some who will understand perfectly, but are unable to memorise).
MaMoTTat,
oh - is THAT what chunking is - yes I do lots of chunking
people have different names for it; some use chunking more to refer to division, but it's all the same idea, splitting it into parts and then multiplying/dividing the two parts individually. For division, like 84/7, they could think "what is 10x7" (because that's an easy one), 70, so how much of the 84 is left? 14. So how many more 7s can you get out of that? 2. Total of 10+2 7s, so 12. If it's a bigger numberlike 182, they might think (amongst other possible ways of doing it), "what is 10x7? 70. Too small. Use 7x2 = 14 to help. So 20x7 is 140. How much is left of the 182? (which would be done by counting on, i.e., 140 to 180 is 40, then 2 more to get to 182). So 42 are left, how many more 7s is that? 6. Total is 20 and 6, so 26. That's one of a number of ways that might be used/taught. It's still really useful to know the times tables automatically, though.