Adding 1- and 2-Digit Numbers (Regrouping)

This online worksheet provides 30 practice problems in which learners add single- and double-digit numbers. The sums require regrouping, so even though the interactivity is catchy, no accommodation is made for the fact that learners might need to make notes for themselves to find the correct sum. They enter answers to all 30 equations and then click submit to get a percentage grade and marks for correct or incorrect answers.