Question

[phan thi van anh]

tính nhanh

a)\(\frac{1995}{1996}\cdot\frac{19961996}{19311931}\cdot\frac{193119311931}{199519951995}\)                      b)\(\frac{1313}{2121}\cdot\frac{165165}{143143}\cdot\frac{424242}{151515}\)

Answer 1

[Son Goku]

\(\frac{1995}{1996}.\frac{19961996}{19311931}.\frac{19311931}{19951995}=\frac{1995}{1996}.\frac{1996}{1931}.\frac{1931}{1995}=1\)

\(\frac{1313}{2121}.\frac{165165}{143143}.\frac{424242}{151515}=\frac{13}{21}.\frac{165}{143}.\frac{42}{15}=\frac{1}{1}.\frac{11}{11}.\frac{2}{1}=2\)

Answer 2

[Vũ Hào Hiệp]

a)=1

b)=2

ủng hộ mk nha