This math topic focuses on identifying simple fractions represented on number lines with uneven tick marks. The primary skill practiced is determining the denominator of fractions that divide a whole into uneven parts. Each question presents a visual number line and asks to identify the correct denominator of the fraction that correctly sections the whole. The available choices for each question range from simple options like halves, thirds, and fourths, to more complex ones like eighths and ninths. This is part of a broader unit aimed at building foundational knowledge in fractions.