Question

use assosative property to find 2×30

Answer 1

You have to use associative property to find 2*30

Two times 30 can be expressed as 30+30

$2\cdot30=30+30=60$

30 can be expressed as 2*15

So another way of solving this calculation is by doing

$2(2\cdot15)=60$

Or

$(2\cdot2)\cdot15=4\cdot15=60$