BÀI 1. (3,0 ĐIỂM) THỰC HIỆN PHÉP TÍNH (TÍNH HỢP LÝ NẾU CÓ THỂ)

3.2 6 2.3= − + +8 736 66− + +8 7 3=2 1= =6 3+ ⋅ − − ⋅b) 8 4 6 4 57 7 11 7 11− −8 4 6 4 5= + ⋅ + ⋅− − 8 4 6 5= + ⋅ + 7 7 11 11 8 4= + ⋅ −7 7 ( 1)= + −7 747

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 −  + c) 3 35 4 13 3= −5 5= 0⋅ −  + d) 5 11 31 0, 75 25% :15 20 53 11 25 320= ⋅ − + 15 4 20 1 0 : 503 11 1 34 20 4 :511 5 3= − + 