5000-2-4-6-.-96-98-100等于?急.

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5000-2-4-6-.-96-98-100等于?急.

5000-2-4-6-.-96-98-100等于?急.
5000-2-4-6-.-96-98-100等于?
急.

5000-2-4-6-.-96-98-100等于?急.
5000-2-4-6-.-96-98-100
=5000-(2+4+6+.+96+98+100)
=5000-(2+100)x50÷2
=5000-2550
=2450

5000-2-4-6-......-96-98-100
=5000-(2+4+6+......+96+98+100)
=5000-[(2+100)+(4+98)+(6+96)+......+(46+56)+(48+54)+(50+52)]
=5000-(102+102+102+......+102+102+102)
=5000-102x25
=5000-2550
=2450