As kids, we know what 4 is before addition is even mentioned. And we can count those 2 marbles and those 2 marbles and then those 4 marbles before learning the "+" sign.
If you think about it, we must know what 2 and 4 mean before we can learn what + means.
As kids, we know what 4 is before addition is even mentioned. And we can count those 2 marbles and those 2 marbles and then those 4 marbles before learning the "+" sign.
If you think about it, we must know what 2 and 4 mean before we can learn what + means.