Tính (theo mẫu): Mẫu: (16 x 15)/(8 x 10) = (8 x 2 x 5 x 3)/(8 x 1 x 5 x 2) = 3/1 = 3
Giải thích
a) \(\frac{{32 \times 50}}{{48 \times 25}} = \frac{{16 \times 2 \times 25 \times 2}}{{16 \times 3 \times 25 \times 1}} = \frac{4}{3}\)
b) \(\frac{{56 \times 27}}{{49 \times 36}} = \frac{{4 \times 2 \times 7 \times 9 \times 3}}{{7 \times 7 \times 9 \times 4}} = \frac{6}{7}\)
c) \(\frac{{121 \times 42}}{{77 \times 54}} = \frac{{11 \times 11 \times 7 \times 6}}{{7 \times 11 \times 9 \times 6}} = \frac{{11}}{9}\)