Question

Greg has 60 building blocks. His sister gives him 17 more blocks.he uses 38 blocks to make a tower.how many blocks are not used in the tower?

Answer 1

if Greg has 60 building blocks, His sister gives him 17 more blocks, and e uses 38 blocks to make a tower the number of blocks you have not used will be given by: 
 60+17-38= 39. 
 39 blocks are not used in the tower.