Câu hỏi của MINH

Question

Bài toán 2: Tìm UCLN.

e) ƯCLN (24 ; 84 ; 180)

b) ƯCLN (24 ; 36)

g) ƯCLN (56 ; 140)

h) ƯCLC (12 ; 14 ; 8 ; 20)

d) ƯCLN (6 ; 8 ; 18)

k) ƯCLN (7 ; 9 ; 12 ; 21)

Kiều Vũ Linh · Accepted Answer

e) $24=2^3.3$$84=2^2.3.7$$180=2^2.3^2.5$$\RightarrowƯCLN\left(24;84;180\right)=2^2.3=12$b) $24=2^2.3$$36=2^2.3^2$$\RightarrowƯCLN\left(24;36\right)=2^2.3=12$g) $56=2^3.7$$140=2^2.5.7$$\RightarrowƯCLN\left(56;140\right)=2^2.7=28$h) $12=2^2.3$$14=2.7$$8=2^3$$20=2^2.5$$\RightarrowƯCLN\left(12;14;8;20\right)=2$d) $6=2.3$$8=2^3$$18=2.3^2$$\RightarrowƯCLN\left(6;8;18\right)=2$k) $7=7$$9=3^2$$12=2^2.3$$21=3.7$$\RightarrowƯCLN\left(7;9;12;21\right)=1$Câu trả lời: e) $24=2^3.3$$84=2^2.3.7$$180=2^2.3^2.5$$\RightarrowƯCLN\left(24;84;180\right)=2^2.3=12$b) $24=2^2.3$$36=2^2.3^2$$\RightarrowƯCLN\left(24;36\right)=2^2.3=12$g) $56=2^3.7$$140=2^2.5.7$$\RightarrowƯCLN\left(56;140\right)=2^2.7=28$h) $12=2^2.3$$14=2.7$$8=2^3$$20=2^2.5$$\RightarrowƯCLN\left(12;14;8;20\right)=2$d) $6=2.3$$8=2^3$$18=2.3^2$$\RightarrowƯCLN\left(6;8;18\right)=2$k) $7=7$$9=3^2$$12=2^2.3$$21=3.7$$\RightarrowƯCLN\left(7;9;12;21\right)=1$

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