it doesnt.
1 + 10 = 11
16
It is minus ten.
twelve
19
It is: 2.4+100+100 = 202.4
Five plus five equals ten.
Ten hectograms is equal to one kilogram.
Seven eights plus three eights is ten eights. Now, possibly you intended to ask about eighths, rather than eights. Ten eighths is equal to one and a quarter. However, ten eights is equal to 80. The extra h makes a difference.
Nought plus twelve. One plus eleven. Two plus ten. Three plus nine. Four plus eight. Five plus seven. Six plus six !
One of ten equal parts would be a tenth.
When Chuck Norris says so. Oh, it's riddle... When putting gloves on, then removing them, I guess.