Students examine the outcome of adding one to a group of items. In this number sense activity, students create stacks of chips and count them. Then, students add one more chip to the stack and count the chips again. Students discuss...

For this adding one worksheet, students solve 10 problems in which the number one is added to a single digit number from 1 to 5.

In this adding one activity, students solve 20 problems in which the number 1 is added to a single digit number. Numbers are both in horizontal and vertical format.