Số? a b c a × b b × a (a × b) × c a × (b × c)
Số?
a |
b |
c |
a × b |
b × a |
(a × b) × c |
a × (b × c) |
7 |
5 |
2 |
? |
? |
? |
? |
8 |
3 |
3 |
? |
? |
? |
? |
10 |
2 |
4 |
? |
? |
? |
? |