Câu hỏi của ĐINH THỊ THU HIỀN

Question

1,3/5 ha +2/7ha=

2.7/8 ha -1/2 ha

3.5/8m²+3/8m²*2=

3.2/7m²/2+6m²=

TFBoys_Châu Anh · Accepted Answer

$\frac{3}{5}ha+\frac{2}{7}ha=\frac{31}{35}ha$

$\frac{7}{8}ha-\frac{1}{2}ha=\frac{3}{8}ha$

$\frac{5}{8}m^2+\frac{3}{8}m^2\times2=\frac{5}{8}m^2+\frac{3}{4}m^2=\frac{11}{8}m^2$

$\frac{2}{7}m^2\div2+6m^2=\frac{1}{7}m^2+6=\frac{43}{7}m^2$

Câu trả lời:

$\frac{3}{5}ha+\frac{2}{7}ha=\frac{31}{35}ha$

$\frac{7}{8}ha-\frac{1}{2}ha=\frac{3}{8}ha$

$\frac{5}{8}m^2+\frac{3}{8}m^2\times2=\frac{5}{8}m^2+\frac{3}{4}m^2=\frac{11}{8}m^2$

$\frac{2}{7}m^2\div2+6m^2=\frac{1}{7}m^2+6=\frac{43}{7}m^2$