Дайте решение этих примеров пожалуйста!!!
(-10)+(+10)=?
(+13)+(+1) + (-1)
(+20) + (-20) + (+1)
(-10)+(+10)=?
(+13)+(+1) + (-1)
(+20) + (-20) + (+1)
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Answers & Comments
(+13)+(+1) + (-1)=13
(+20) + (-20) + (+1)=1
2)13+1+(-1)=13
3)20+(-20)+1=1