What’s on the Adding Fractions poster
The rule, 4 worked examples, and the mistake everyone makes.
- When the denominators match, add only the numerators. The denominator names the size…
- a/c + b/c = (a+b)/c
- 3/8 + 2/8 = 5/8
- 5/6 + 4/6 = 9/6 = 1 1/2
- 7/10 − 3/10 = 4/10 = 2/5
- 1/4 + 1/4 + 1/4 = 3/4
- Common mistake: 3/8 + 2/8 = 5/16 → 3/8 + 2/8 = 5/8
Different bottoms? Make them match first, using equivalent fractions.
Questions about the Adding Fractions poster
- What’s on the Adding Fractions poster?
- The rule, 4 worked examples, and the mistake everyone makes. When the denominators match, add only the numerators. The denominator names the size…; a/c + b/c = (a+b)/c; 3/8 + 2/8 = 5/8; 5/6 + 4/6 = 9/6 = 1 1/2; 7/10 − 3/10 = 4/10 = 2/5; 1/4 + 1/4 + 1/4 = 3/4; Common mistake: 3/8 + 2/8 = 5/16 → 3/8 + 2/8 = 5/8. Different bottoms? Make them match first, using equivalent fractions.
- Who is the Adding Fractions poster for?
- Adding Fractions is filed under 4th Grade (ages 9–10), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting math, and to the parent or teacher answering the question at the kitchen table.
- When should you use the Adding Fractions poster?
- Ask what the bottom number is naming. It is the size of the pieces, and that does not change. A wall chart earns its place by being glanceable from where the work is happening, so Adding Fractions belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
- What other posters go with Adding Fractions?
- Comparing Decimals, Decimal Place Value and Dividing by 10 sit alongside Adding Fractions in the 4th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Comparing DecimalsDecimal Place ValueDividing by 10
- Is the Adding Fractions poster free to download and print?
- Yes. Adding Fractions downloads as a free PDF with no account, no email and no watermark, like everything else in the 4th Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Adding Fractions poster print at?
- Adding Fractions is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Adding Fractions loses nothing.Printing guide
Related posters
Charts that sit alongside Adding Fractions on the same wall.
Browse every 4th Grade poster, or start from the full catalogue.