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

Toán Lớp 5: 1. Tính bằng cách hợp lí: a) 9,28 + 2,46 + 4,72 = ………………………………………………………. b) 3,78 + 4,54 – 1,78 = ………………………………………………………. c) 2,5 x 3,7 x 4 ...

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