Tìm ƯC của các số sau:
a)54;72;148 b)600;450;126 c)250;400;75
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) Ta có:
144=24.3
420=22.3.5.7
ƯCLN(...)=22.3=12
ƯC(...)=Ư(12)={1;2;3;4;6;12}
Các bài sau bn cũng lm thế này nhé:)))
a) 54=2.33; 48=23.6 b)45=5.32 ; 60=22.3.5 c)48=24.3 ; 72=22.32 ;90=2.32.5
TSNT chung:2 TSNT chung:3;5 TSNT chung:2;3
ƯCLN(54;48)=2=2 ƯCLN(45;60)=3.5=15 ƯCLN(48;72;90)=2.3=6
ƯC(54;48)=Ư(2)={1;2} ƯC(45;60)=Ư(15)={1;3;5;15} ƯC(48;72;60)=Ư(6)={1;2;3;6}
a) 54=2.33; 48=23.6 b)45=5.32 ; 60=22.3.5 c)48=24.3 ; 72=22.32 ;90=2.32.5
TSNT chung:2 TSNT chung:3;5 TSNT chung:2;3
ƯCLN(54;48)=2=2 ƯCLN(45;60)=3.5=15 ƯCLN(48;72;90)=2.3=6
ƯC(54;48)=Ư(2)={1;2} ƯC(45;60)=Ư(15)={1;3;5;15} ƯC(48;72;60)=Ư(6)={1;2;3;6}
a: \(Ư\left(16\right)=\left\{1;2;4;8;16\right\}\)
\(Ư\left(24\right)=\left\{1;2;3;4;6;8;12;24\right\}\)
\(ƯC\left(16;24\right)=\left\{1;2;4;8\right\}\)
b: \(Ư\left(20\right)=\left\{1;2;4;5;10;20\right\}\)
\(Ư\left(32\right)=\left\{1;2;4;8;16;32\right\}\)
\(ƯC\left(20;32\right)=\left\{1;2;4\right\}\)
\(a.120=2^3.3.5\)
\(320=2^6.5\)
\(ƯC\left(120;320\right)=\left\{40;80;120;160;200;...\right\}\)
\(ƯCLN\left(120;320\right)=2^3.5=40\)
\(b.455=5.7.13\)
\(950=2.5^2.19\)
\(ƯC\left(455;950\right)=\left\{5;10;15;20;25;...\right\}\)
\(ƯCLN\left(455;950\right)=5\)
\(c.126=2.3^2.7\)
\(108=2^2.3^3\)
\(306=2.3^2.17\)
\(ƯC\left(126;108;306\right)=\left\{18;36;54;72;...\right\}\)
\(ƯCLN\left(126;108;306\right)=2.3^2=18\)
a.120=23.3.5�.120=23.3.5
320=26.5320=26.5
ƯC(120;320)={40;80;120;160;200;...}Ư�(120;320)={40;80;120;160;200;...}
ƯCLN(120;320)=23.5=40Ư���(120;320)=23.5=40
b.455=5.7.13�.455=5.7.13
950=2.52.19950=2.52.19
ƯC(455;950)={5;10;15;20;25;...}Ư�(455;950)={5;10;15;20;25;...}
ƯCLN(455;950)=5Ư���(455;950)=5
c.126=2.32.7�.126=2.32.7
108=22.33108=22.33
306=2.32.17306=2.32.17
ƯC(126;108;306)={18;36;54;72;...}Ư�(126;108;306)={18;36;54;72;...}
ƯCLN(126;108;306)=2.32=18
sai lớp rồi kìa
a) Ư(8) = { 1; 2; 4; 8; -1; -2; -4; -8 }
Ư(12) = { 1; 2; 3; 4; 6 ;12; -1; -2; -3; -4; -6; -12 }
Vậy ƯC(8; 12) = { 1; 2; 4; -1; -2; -4 }
b) Ư(12) = { 1; 2; 3; 4; 6 ;12; -1; -2; -3; -4; -6; -12 }
Ư(15) = { 1; 3; 5; 15; -1; -3; -5; -15 }
Ư(30) = { 1; 2; 3; 5; 10; 15; 30; -1; -2; -3; -5; -10; -15; -30 }
Vậy ƯC(12; 15; 30) = { 1; 3; -1; -3 }
c) Ư(60) = { 1; 2; 3; 4; 5; 6; 10; 15; 20; 30; 60; -1; -2; -3; -4; -5; -6; -10; -15; -20; -30; -60 }
Ư(72) = { 1; 2; 3; 4; 6; 8; 9; 12; 18; 24; 36; 72; -1; -2; -3; -4; -6; -8; -9; -12; -18; -24; -36; -72 }
Vậy ƯC(60 ; 72) = { 1; 2; 3; 4; 6; -1; -2; -3; -4; -6 }
d) Ư(24) = { 1; 2; 3; 4; 6; 8; 12; 24; -1; -2; -3; -4; -6; -8; -12; -24 }
Ư(42) = { 1; 2; 3; 6; 7; 14; 21; 42; -1; -2; -3; -6; -7; -14; -21; 42 }
Vậy ƯC(24; 42) = { 1; 2; 3; 6; -1; -2; -3; -6 }
Co :60=22.3.5
72=23.32
»UCLN(60,72)=22.3=12
»UC (60,72)=U(12)={1,2,3,4,6,12}.
a) S
b) S
c) Đ
Tick mình nha Nguyễn Hà Thảo Vy làm ơn nhé!
cứu mk
ko bít nah chị em lớp 5 sory