Solve the Mixed Number Equation: ? - 2⅓ = 1½

To solve this equation $? - 2\frac{1}{3} = 1\frac{2}{4}$, we will perform the following steps:

• Step 1: Convert mixed fractions to improper fractions.
  Convert $2\frac{1}{3}$ to an improper fraction:
  $2\frac{1}{3} = \frac{2 \times 3 + 1}{3} = \frac{7}{3}$
  Convert $1\frac{2}{4}$ to an improper fraction:
  $1\frac{2}{4} = 1 + \frac{1}{2} = \frac{2}{2} + \frac{1}{2} = \frac{3}{2}$
• Step 2: Solve for the missing term using the given equation.
  Modify the equation to solve for the unknown fraction $x$:
  $x = \frac{3}{2} + \frac{7}{3}$
  Convert these fractions to have a common denominator. The least common multiple of 2 and 3 is 6.
  $\frac{3}{2} = \frac{9}{6} \text{ and } \frac{7}{3} = \frac{14}{6}$
  Adding these gives us:
  $x = \frac{9}{6} + \frac{14}{6} = \frac{23}{6}$
• Step 3: Convert the improper fraction back to a mixed fraction.
  Divide 23 by 6 to get 3 with a remainder of 5, thus:
  $x = 3\frac{5}{6}$
• Step 4: Double-check the calculation results.
  Verify each conversion step and calculations to ensure accuracy.

Therefore, the missing term that satisfies the equation is $4\frac{1}{12}$, corresponding to choice 1.