a) Two suitable cards to make the calculation equal to -1 are:
2 and -3
b) Two suitable cards to give the smallest possible answer are: -7 and -4.
c) Two suitable cards to give the smallest possible answer are: 1 and 2.
How to find the sum of the numbers?
The numbers on the five cards are:
-4, 2, -7, -3, 1
a) Two suitable cards to make the calculation equal to -1 are:
2 and -3 because: 2 + (-3) = -1
b) Two suitable cards to give the smallest possible answer will be the sum of the least numbers which are: -7 and -4.
c) Two suitable cards to give the smallest possible answer will be the sum of the greatest numbers which are: 1 and 2.