Toán Lớp 6: (+8) -11= 20-15
2x- (3+x)=5-7
(3x -2^4 ). 7^5= 2.7^6
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Toán Lớp 6: (+8) -11= 20-15
2x- (3+x)=5-7
(3x -2^4 ). 7^5= 2.7^6
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