Some possible correct answers are:
15+8; 30-7; 46/2; 11.5(2)
Explanation:
There are many ways to make 23. If we want to add, we can choose any number. The number we would add to it to make 23 can be found by subtracting. For example, if we choose 15:
15 + ___ = 23
To fill in the blank, subtract 15 from 23:
23 - 15 = 8
This means
15+8 = 23.
If we want to subtract, we can choose a number larger than 23 to begin with. We then subtract 23 from it. For example, if we choose 30:
30 - ___ = 23
Subtract 23 from 30:
30-23 = 7
This gives us
30-7 = 23.
If we want to multiply to make 23, we would choose a number to begin with and divide. For example, if we choose 2:
2*___ = 23
Divide 23 by 2:
23/2 = 11.5
This means that 2(11.5) = 23.
If we want to divide to make 23, we can start with a number larger than 23. We then divide this number by 23. For example, if we choose 46:
46/___ = 23
Divide:
46/23 = 2
This means that
46/2 = 23.
