\(\frac{4212}{14640}=\frac{4212:2}{14640:2}=\frac{2106}{7320}\)
\(\frac{6318}{21960}=\frac{6318:3}{21960:3}=\frac{2106}{7320}\)
Vậy\(\frac{2106}{7320}=\frac{4212}{14640}=\frac{6318}{21960}\)
a) 1717/2929 và 171717/292929
1717/2929 = 17x101/29x101 = 17/29 và 17x10101/29x10101 = 17/29
Vậy hai phân số bằng nhau
421214640 =4212:214640:2 =21067320
631821960 =6318:321960:3 =21067320
Vậy21067320 =421214640 =631821960
b)\(\frac{3210-34}{4170-41}=\frac{2\left(3210-34\right)}{2\left(4170-41\right)}\)=\(\frac{6420-68}{8340-82}\)=> ĐPCM
a,Ta có:\(\frac{171717}{292929}=\frac{17.10101}{29.10101}=\frac{17}{29}\)
\(\frac{1717}{2929}=\frac{101.17}{101.29}=\frac{17}{29}\)
Mà\(\frac{17}{29}=\frac{17}{29}\Rightarrow\frac{1717}{2929}=\frac{171717}{292929}\)
Vậy.....