Add and subtract fractions with different denominators and mixed numbers, using the concept of equivalent fractions
| 1. | Pass the pieces, please!: Fraction addition *+1/2=7/12 | |
| 2. | Fraction output: Fraction addition *+2/3=3/4 | |
| 3. | Fractional output: Fraction addition 1/4+1/5=* | |
| 4. | Fractions mounting: Fractions addition 1/3+1/2=* |