standard_description: Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape.
problem_activity: Problem 3
Pre-unit
Find the value of each sum or difference.
\(374 + 455\)
\(259 - 186\)


aligns: no