Step-by-step explanation:
We can do this either by looking at:
the bonds of 12, (of which there are 7 pairs)
(which pairs of numbers add up to 12?)
or the factors of 32 (of which there are 3 pairs)
Using the factors seems quicker.
Write the factors and in each find their sum.
As 12 is quite small in comparison to 32, I would expect that the middle factors will be the ones we want - they have the smallest sum and the smallest difference of all the pairs:
1×32
=32
1+32
=33
2×16
=32
2+16
=18
4×8
=32
4+8
=12
these are the ones we want.