Toán Lớp 5: 15,8 + 249,19 78 - 56,125 7,826 x 4,5 6,9828 : 2,53 -

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Toán Lớp 5: 15,8 + 249,19 78 – 56,125 7,826 x 4,5 6,9828 : 2,53