Question

1/2×3+1/3×4+1/4×5+……+1/98×99+1/99×100=？

Answer 1

=1/2-1/3+1/3-1/4+1/4-1/5+……+1/99-1/100
=1-1/100
=99/100

Answer 2

办、—∈—54∷=54

企、∈+3.6∷=3.6

话、—∈+话尸欠皋∷=—话尸欠皋

煌、—∈—皋尸欠企∷= 皋尸欠企
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