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SEAMO 2016 — Paper B — Grade 3–4 Question 8

SEAMO · SEAMO 2016 — Paper B — Grade 3–4

Question 8

Calculate $1-2+3-4+\cdots+73-74+75$.
  1. $37$
  2. $38$
  3. $39$
  4. $40$
  5. None of the above