Question

[nguyễn]

11-12+13-14+15-16+17-18+19-20

Answer 1

[vuhuyentrang83( roblox )]

= -1+ ( -1 ) + ( -1 ) + ( -1 ) + ( -1 ) 

= -2 + ( -3)

= - 5

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Answer 2

[456]

\(\text{11-12+13-14+15-16+17-18+19-20}\)

\(=\left(-1\right)+\left(-1\right)+\left(-1\right)+\left(-1\right)+\left(-1\right)\)

\(=\left(-1\right).5\)

\(=-5\)