tính nhanh
908-132-268-88+84-80+….
=12-8+4
100-96+42-88+…+12-874=
tính nhanh 908-132-268-88+84-80+…. =12-8+4 100-96+42-88+…+12-874=
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tính nhanh
908-132-268-88+84-80+….
=12-8+4
100-96+42-88+…+12-874=