1. tính giá trị biểu thức a, 347,68 + 49,56 b, 95,62 - 412,76 c,118,07 * 5,6 d, 88,2 : 36 2. tìm x a, a, ( X + 82,7 ) * 0,01 = 2,056 b, X : 5,26 = 54,62 - 27,17 3. tính bằng cách thuận tiện a, 7,5 * 1,2 + 3 * 24,5 * 4 - 6 * 12 * 2 b, 125,1 : 0,9 + 0,72 : 0,9 - 53,1 : 0,9

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