Definition
Additive comparison
An additive comparison tells how much more or less one amount is than another.
Continue from this idea into connected AXIO math.
Boundary check: The 5-unit gap is additive; “times as many” would be multiplicative.
What it means
Put the two amounts side by side and look at the gap between them. That gap tells how many more the larger amount has, or how many fewer the smaller amount has. Addition or subtraction finds the gap.
Remember it
Additive comparison asks for the gap: “how many more?” or “how many fewer?”
Example
Mina has 14 shells and Eli has 9. The gap is 14 − 9 = 5, so Mina has 5 more shells than Eli. Check: 9 + 5 = 14.
Watch for
“Four times as many” is a multiplicative comparison, not an additive comparison. It describes a scale factor instead of a difference.
Common mix-up
Subtract the smaller amount from the larger to find a positive gap, then use the wording to say who has more or fewer.
Exact meaning
An additive comparison compares two amounts by their difference. If L is the larger amount, S is the smaller amount, and d is the difference, then L = S + d and d = L − S.