Câu 3: Trang 44 sách VNEN toán 4
Tính (theo mẫu):
$2+\frac{2}{3}$ $\frac{3}{4}+ 5$ $\frac{8}{12}+ 2$
Bài Làm:
$2+\frac{2}{3}=\frac{2}{1}+\frac{2}{3}=\frac{3}{3}+\frac{2}{3}=\frac{5}{3}$
$\frac{3}{4}+ 5= \frac{3}{4}+\frac{5}{1}=\frac{3}{4}+\frac{20}{4}=\frac{23}{4}$
$\frac{8}{12}+ 2= \frac{8}{12}+\frac{2}{1}=\frac{8}{12}+\frac{24}{12}=\frac{32}{12}$