Zachary did 46 push-ups and 58 crunches in gym class today. David did 38 more push-ups but 62 less crunches than zachary. How many more crunches than push-ups did Zachary do?
First, we need to find the total number of push-ups that Zachary and David did. 46 + 38 is the same as 84, so we can say that Zachary and David did 84 push-ups in total. 

Next, we need to find the total number of crunches that Zachary and David did. 58 + 62 is the same as 120, so we can say that Zachary and David did 120 crunches in total. 

Now, we need to find the difference between the total number of crunches and the total number of push-ups. 120 - 84 is the same as 36, so we can say that there were 36 more crunches than push-ups. 

Therefore, the answer (numeric) is: 

36