I wrote these 100 problems for my 2nd graders. I have listed them for sale in groups of 10, but these are all of them in one place for a discount. Each problem has 3 different number sets so you can differentiate instruction, as well as an extension problem for an additional challenge. The skills they encompass are: addition with and without regrouping, addition with 3 addends, "between," compare problems, division, elapsed time, extra information problems, fractions, greater than/less than, log