Toán Lớp 5: Bài 1: Tính nhanh:
\frac{1}{5}+\frac{1}{10}+\frac{1}{20}+\frac{1}{40}+\ldots+\frac{1}{1280}
Bài 2: Tìm y
\frac{3}{5}-\frac{1}{3} \times(2,48+0,52) \times y: 60: 5=\frac{1}{5}
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Toán Lớp 5: Bài 1: Tính nhanh:
\frac{1}{5}+\frac{1}{10}+\frac{1}{20}+\frac{1}{40}+\ldots+\frac{1}{1280}
Bài 2: Tìm y
\frac{3}{5}-\frac{1}{3} \times(2,48+0,52) \times y: 60: 5=\frac{1}{5}
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