(+16)+(-29)-(-7)-(+11)+(+9)等于多少?

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(+16)+(-29)-(-7)-(+11)+(+9)等于多少?
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(+16)+(-29)-(-7)-(+11)+(+9)等于多少?
(+16)+(-29)-(-7)-(+11)+(+9)等于多少?

(+16)+(-29)-(-7)-(+11)+(+9)等于多少?
16-29+7-11+9=-8

(+16)+(-29)-(-7)-(+11)+(+9)
=16-29+7-11+9
=10-20
=-10