Solve Mixed Number Addition: 4 2/3 + 1 1/4

Question

423+114= 4\frac{2}{3}+1\frac{1}{4}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll add two mixed numbers, 4234\frac{2}{3} and 1141\frac{1}{4}, by following these steps:

  • Step 1: Convert each mixed number to an improper fraction.
  • Step 2: Find a common denominator and adjust fractions accordingly.
  • Step 3: Add the fractions and simplify.
  • Step 4: Convert the result back to a mixed number, if necessary.

Let's carry out each step in detail:

Step 1: Convert to Improper Fractions
For 4234\frac{2}{3}, convert to: 4×3+23=12+23=143\frac{4 \times 3 + 2}{3} = \frac{12 + 2}{3} = \frac{14}{3}.
For 1141\frac{1}{4}, convert to: 1×4+14=4+14=54\frac{1 \times 4 + 1}{4} = \frac{4 + 1}{4} = \frac{5}{4}.

Step 2: Find the Common Denominator
The denominators are 3 and 4. The least common multiple (LCM) is 12.

Convert 143\frac{14}{3} to a denominator of 12: 14×43×4=5612\frac{14 \times 4}{3 \times 4} = \frac{56}{12}.
Convert 54\frac{5}{4} to a denominator of 12: 5×34×3=1512\frac{5 \times 3}{4 \times 3} = \frac{15}{12}.

Step 3: Add the Fractions
Add 5612\frac{56}{12} and 1512\frac{15}{12}:
5612+1512=56+1512=7112\frac{56}{12} + \frac{15}{12} = \frac{56 + 15}{12} = \frac{71}{12}.

Step 4: Convert to a Mixed Number
Divide 71 by 12. The quotient is 5 and the remainder is 11, so:
7112=51112\frac{71}{12} = 5\frac{11}{12}.

Therefore, the solution to the problem is 511125\frac{11}{12}.

Answer

51112 5\frac{11}{12}