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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: tìm BCNN rồi tìm BC của các số sau 120, 140, 300

Toán Lớp 6: tìm BCNN rồi tìm BC của các số sau 120, 140, 300

Comments ( 1 )

  1. Ta có:
    120=2^3.3.5
    140=2^2.5.7
    300=2^2.3.5^2
    =>BCNNN(120,140,300)=2^{3}.3.5^{2}.7=4200
    =>BC(120,140,300)=B(4200)={0;4200;8400;12600;16800;….}
    Vậy BC(120,140,300)=B(4200)={0;4200;8400;12600;16800;….}

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222-9+11+12:2*14+14 = ? ( )

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