In a case such as this, it is recommended that zero be considered a part of the expanded notation
It includes math concepts such as addition and subtraction, skip counting, ordinal numbers, expanded notation
, length and weight, graphing, and probability.
Can you explain your number using expanded notation
(24 is 2 tens and 4 ones or 20 + 4)?
The book offers a wide variety of activities, including matching various forms of expanded notation
, working out problems that involve skip counting, recognizing fractional parts in drawings, and solving "Who am I?