Time | 3rd grade | Math | Khan Academy Time differences (within 60 minutes) Get 3 of 4 questions to level up! Practice Telling time word problems (within the hour) Get 5 of 7 questions to level up! Practice Quiz 2 Level up on the above skills and collect up to 160 Mastery points Start quiz Unit test Level up on all the skills in this unit and collect up to 500 Mastery points!