Harrison made a building using 124 blocks Greyson made a building using 78 blocks haw many more blocks did Harrison use than Greyson

46 Blocks

Step-by-step explanation:

As it is given in the question:

Harrison made a building using blocks = 124

Greyson made a building using bloks = 78

Now we need to know that how many more blocks did Harrison use than Greyson.

To calculate the difference between Harrison's block and Greyson's block used to build a building we just subtract Greyson's number of used blocks from Harrison's number of used blocks

= 124 - 78 = 46

Answer is Harrison used 46 blocks more than the number of the blocks used by Greyson.