Tính: (1 điểm) a) \(\frac{2}{5}\,\, + \,\,\frac{1}{2}\,\, = \,\,\frac{1}{1}\) b) \(\frac{7}\,\, \times \,\,\frac{3}{4}\,\, = \,\,\frac{1}{1}\) c) \[\frac{3}{2}\,\, - \,\,\frac{1}{3}\,\, = \,\,\frac{1}{1}\] d) \(\frac{5}\,\,:\,\,\frac{3}{5}\,\, = \,\,\frac{1}{1}\) 
1
