Tính: (-199) + (-200) + (-201)
Giải thích
(–199) + (–200) + (–201)
= (–199) + (–201) + (–200) (tính chất giao hoán )
= – (199 + 201) + (–200)
= –400 + (–200)
= –(400 + 200)
= –600.
(–199) + (–200) + (–201)
= (–199) + (–201) + (–200) (tính chất giao hoán )
= – (199 + 201) + (–200)
= –400 + (–200)
= –(400 + 200)
= –600.