Add and Subtract Mixed Numbers

Solve 2 3/4 + 1 2/4 by reasoning about the parts.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 64

Add 2 and 3 fourths pans of brownies and 1 and 2 fourths pans. Add the wholes: 2 plus 1 is 3. Add the parts: 3 fourths plus 2 fourths is 5 fourths.
5 fourths is a whole pan and 1 fourth more. So the total is 4 and 1 fourth pans.
Now subtract: 3 and 1 eighth minus 1 and 5 eighths. There's only 1 eighth, not enough to take away 5.
Trade one whole pan for 8 eighths. 3 and 1 eighth is 2 and 9 eighths. Take away 1 and 5 eighths: 1 and 4 eighths is left.

Georgia's K-12 Mathematics Standards:

4.NR.4.6 — Add and subtract fractions and mixed numbers with like denominators using a variety of tools.