Students practice addition by regrouping numbers into friendly, round values using virtual place value blocks. Learners drag hundreds, tens, and ones blocks to build two given numbers, then regroup blocks to create easier-to-add friendly numbers before checking their sum. Supports TEKS 2.2.A, 2.2.B, 3.2.A, 3.2.B, 3.2.D (place value and addition strategies).
Skills: regrouping, place value, mental math, addition strategies. Grades 2-3.