Một cửa hàng có 75 000 quyển vở. Buổi sáng, cửa hàng bán 23 450 quyển, buổi chiều bán thêm 15 678 quyển. Hỏi cửa hàng còn lại bao nhiêu quyển vở?

Mẫu: \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{5746}\\{1962}\end{array}} \\\,\,\,3784\end{array}\)                                    Thử lại: \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{3784}\\{1962}\end{array}} \\\,\,\,\,5746\end{array}\)

a)               8 923 – 4 157

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27 069 – 9 537

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b)             \(\frac{8}{{15}} - \frac{2}{{15}}\)

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\(1 - \frac{3}{7}\)

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c)             7,284 – 5,596

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0,863 – 0,298

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