Addition 101

This section introduces foundational addition by focusing on adding small numbers (1, 2, 3, and 4). Through simple problems such as 6 + 3 and 4 + 2, students develop accuracy, fluency, and confidence in basic addition.

This section introduces double facts, in which the same number is added to itself (e.g., 2 + 2 or 7 + 7). Practicing doubles helps students recognize patterns in numbers and quickly recall common sums, building speed and confidence with basic addition.

This section focuses on adding numbers that are one apart, such as 4 + 5 or 7 + 6. By recognizing that these problems are close to double facts, students learn to use what they know about doubles to solve new sums more quickly and build stronger number sense.

This section helps students learn number pairs that add up to 10, and then extends the skill to combinations that add up to 9 and 11. Through problems such as 6 + 4, 7 + 3, and similar pairs, students strengthen number sense and learn to quickly recognize sums that form important benchmark numbers used in mental math.