Please solve these word problem.Last saturday ,jia li spent 6 hours altogether playing games ,studying and chatting with his friends ,he spent 2/5of the time playing games and 1/2 of the time studying .how many minutes did he spend chatting with his friends ?

Answer 1

as with all word problems, turn the sentences into algebra. Then anyone can solve the equations. So, what have they told you here?
g+s+c = 6 hours
g = 2/5 of 6 is 12/5 or 2.4
s = 1/2 of 6 is 3
Now you can figure out what c is. (in minutes!)

Answer 2

T = 6 - (2/5+1/2)6 = 6 - (4/10+5/10)6 = 6 - (0.9)6 = 0.6 h.