Covers topics such as one-digit, two-digit, and three-digit addition, partial sums, regrouping, and place value.

Numbers and place value -- Adding one-digit numbers -- Addition terms -- Column addition -- What is regrouping? -- The zero property -- The commutative property -- The associative property -- Adding two-digit numbers -- Regrouping and carrying -- Adding three-digit numbers -- Regrouping for three digits -- Adding greater numbers -- Partial sums -- Rounding to estimate -- Mental addition -- Adding money -- Adding time -- Addition key words -- Word problems.