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Khanh08
2 năm trước
1. Tính nhanh 1. 10(81+19)+100+50(91+9) ; 2. 53(51+4)+53(49+96)+3 3. 42(15+96)+(25+4).7 ; 4.45(13+78)+9(87+22).5 5. 16(27+75)+8(53+5).2 AI giải được tăng 60 điểm
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