Câu 3: Trang 53 sách VNEN toán 4
Tính (theo mẫu):
$\frac{3}{7}\times 2$ $\frac{5}{12}\times 1$ $3\times \frac{4}{7}$ $0\times \frac{5}{9}$
Bài Làm:
$\frac{3}{7}\times 2=\frac{3\times 2}{7}=\frac{6}{7}$
$\frac{5}{12}\times 1=\frac{5\times 1}{12}=\frac{5}{12}$
$3\times \frac{4}{7}=\frac{3\times 4}{7}=\frac{12}{7}$
$0\times \frac{5}{9}=\frac{0\times 5}{9}=\frac{0}{9}$