Câu 8:
a: =2000235
b: =12km250600m2
c: =5000kg+200kg=5200kg
Câu 7 :
a | \(\dfrac{2}{5}\) | \(\dfrac{3}{4}\) | \(\dfrac{5}{4}\) | \(\dfrac{1}{4}\) |
b | \(\dfrac{1}{2}\) | \(\dfrac{5}{6}\) | \(\dfrac{7}{12}\) | \(\dfrac{4}{7}\) |
a \(+\) b | \(\dfrac{9}{10}\) | \(\dfrac{19}{12}\) | \(\dfrac{11}{6}\) | \(\dfrac{23}{28}\) |
a \(\times\) b | \(\dfrac{1}{5}\) | \(\dfrac{5}{8}\) | \(\dfrac{35}{48}\) | \(\dfrac{1}{7}\) |
Bài 8 :
a) \(2\) \(km^2\) \(235\) \(m^2\) \(= 2235\) \(m^2\)
b) \(12050600\) \(m^2 =\) \(12\) \(km^2\) \(50600 \) \(m^2\)
c) \(5\) tấn \(2\) tạ \(= 5200\) \(kg\)