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oanhdl1
2 năm trước
Bài 1: Tính giải trị biểu thức a) (-25).(-3).x với x=4 b) (-1).(-4).5.8.y với y=25 c) (2ab²) :c với a= 4; b=-6; c=12 d) [(-25).(-27).(-x)] : với x =4; y=-9
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