Yes, math is called maths in Welsh.
Mathemateg
Cymraeg
No in Welsh is dim.
"y diwedd" is how you say it in Welsh language.
In America it is math, in most European countries it is maths
In Welsh, you would say "Rwy'n cytuno" to say "I agree."
If you say it to someone you should use : "Étudiestes maths"
Daeargi Cymreig
"She is" would be "mae hi" in Welsh.
sombi is the Welsh word.
everything is popeth in welsh