In Yu-Gi-Oh how do the fusion monsters get thier attack?

Question

whoever gives me most details gets best answer. please real answers only

Answer 1

As them 2 answerers said and also for example:

Clayman+Sparkman=Thundergiant

Clayman=800 ATK

Sparkman=1600 ATK

Thundergiant=2400 ATK

Thats easy to see but:

Avian+Burstinatrix=Flame Wingman

Avian=1000 ATK

Burstinatrix=1200 ATK

Flame Wingman=2100 ATK

On that monster they just made up an ATK.

Answer 2

most fusion cards have the atk and def mentioned, but for the ones with 0/0 or ?/? you will have to read the effect to know exactly how much atk and defense they get.

Answer 3

The card will say how much ATK and DEF.

Monsters like Chimeratech Overdragon get their ATK from the fusion material monsters