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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 4: a) 45 : (5 x 9) Cách 1 : ………………… ………………………… Cách 2 : ………………… ………………………… Cách 3 : ………………… ………………………… b) (15 x 9) : 3 Cách 1 : ………………… ………………………… Cách 2 : ………………… ………………………… Cách 3 : ………………… ………………………… ...

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