Toán Lớp 6: 1:cho 120=2³.3.5. 180=2³.3².5khi đó BCNN(120,180) bằng?
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Toán Lớp 6: 1:cho 120=2³.3.5. 180=2³.3².5khi đó BCNN(120,180) bằng?
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Giải đáp và lời giải
120=2^(3).3.5
180=2^(2).3^(2).5
=>\text{BCNN}(120,180)=2^(3).3^(2).5=360
$\text{ @HV }$
120 = 2^3. 3. 5
180 = 2^3. 3^2. 5
⇒ BCNN(120 ; 180) = 2^3. 3^2. 5 = 8. 9. 5 = 360