Answer:
Equality Sign
Step-by-step explanation:
A child may be at educational risk if he is unable to use the equality sign as it is the basis for comparison of numbers.
Once a child can determine if two numbers are the same, we can then proceed to introduce comparisons of numbers. That is, either it is more than a stated number or less.
For example,
If number of apples=6, a child who understands this will know if 5 apples are less or more as appropriate.