Toán Lớp 5: Y : 0,75 + Y : 0,5 = 3/10
Y x 3/4 – Y x0,25 = 1/2
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Toán Lớp 5: Y : 0,75 + Y : 0,5 = 3/10
Y x 3/4 – Y x0,25 = 1/2
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