There are 50 more pens than notebooks on Wesley's school library shelf. If there are 30 notebooks on the shelf, how many notebooks and pens, does he have altogether? Think carefully first, then make a decision:
If there are 30 notebooks on the shelf, there are 50 + 30 = 80 pens on the shelf. Altogether, Wesley has 80 + 30 = 110 notebooks and pens on the shelf. So, the answer is 110.