The “100 Single-Digit Addition Questions with Some Regrouping” worksheet has long held the #1 most popular spot on the Math-Drills website; however, it had a few minor issues that have been rectified with a recent update. The issues related to the available versions, the instructions, the name and date fields and the repetition of questions; all minor issues, but still worth fixing. In addition, the “All Regrouping” and “No Regrouping” worksheets were also updated and all three types now include worksheets with 100, 64, 25 and 12 questions.
There have actually been a few iterations of the single-digit addition worksheets, so when you visited a worksheet page, you were offered various options including versions A to Z, but only the first 10 versions (A to J) were the newest versions and the rest were old versions. The All and Old versions also contained various things. To fix these issues, all the versions from A to Z were updated, the oldest versions were ditched and the All version now includes the updated A to Z versions. The Old version includes the last iteration of A to J.
I used to fall into the trap of instructing students to “find” something on the worksheet when what I really meant was “calculate” the answer. A minor fix on the new versions is that the instructions to students are “Calculate each sum” rather than “Find each sum.”
The old versions of the single-digit addition worksheets did not include name and date fields, but they do now! A “Score” field was also included for those wishing to use it.
Controlling for repetition when developing worksheets helps avoid having the same question repeated too soon or at all on the same page. It is also nice to cover as many different questions as possible, so in the new versions, all possible questions are on the page as few times as possible. For example, if there were 100 questions on the page and 50 possible questions, each question would appear two times. If there are more possible questions than questions on the page, each question on the page will be unique and selected from the entire set. For example, using a range of 1 to 9, there are 81 possible question, but if there are only 64 questions on the page, a random selection of 64 of the 81 questions will be shown.
As requested in the comments, the very old versions: