Toán ƯCLN (126;210) BCNN (42;70;180(;) BCNN(40;52) 30/11/2021 By Athena ƯCLN (126;210) BCNN (42;70;180(;) BCNN(40;52)
Ta có : 126 = 2. 3 ^2 . 7 210= 2.3.5.7 => ƯCLN ( 126 ; 210 ) = 2.3.7 = 42 Ta có: 42 = 2.3.7 70=2.5.7 180=2^2.3^2.5 =>BCNN(42;70;180) = 2^2 . 3^2.5.7 = 1260 Ta có : 40 = 2^3.5 52=2^2.13 => BCNN ( 40 ; 52 ) = 2^3 . 5 .13 = 520 Chúc cậu học tốt nhé Trả lời
126=2×3^2×7/ 210=2×3×5×7/ ƯCLN(126;210)=2×3×7=42/ 42=2×3×7/ 70=2×5×7/ 180=2^2×3^2×5/ BCNN(42;70;180)=2^2×3^2×5×7=1260/ 40=2^3×5/ 52=2^2×13/ BCNN(40;52)=2^3×5×13=520 Trả lời
Ta có :
126 = 2. 3 ^2 . 7
210= 2.3.5.7
=> ƯCLN ( 126 ; 210 ) = 2.3.7 = 42
Ta có:
42 = 2.3.7
70=2.5.7
180=2^2.3^2.5
=>BCNN(42;70;180) = 2^2 . 3^2.5.7 = 1260
Ta có :
40 = 2^3.5
52=2^2.13
=> BCNN ( 40 ; 52 ) = 2^3 . 5 .13 = 520
Chúc cậu học tốt nhé
126=2×3^2×7/
210=2×3×5×7/
ƯCLN(126;210)=2×3×7=42/
42=2×3×7/
70=2×5×7/
180=2^2×3^2×5/
BCNN(42;70;180)=2^2×3^2×5×7=1260/
40=2^3×5/
52=2^2×13/
BCNN(40;52)=2^3×5×13=520