Number bonds and complements
Pairs that make 10, 20, 100 or 1000 (and the 9s, 99s and 999s), as missing-number sums or as subtraction.
The hardest cards: numbers up to 12 that can only make 24 by going through a fraction along the way.
The hardest cards: numbers up to 12 that can only make 24 by going through a fraction along the way.
You can change any of these settings above. Press "New problems" for a fresh set with the same settings, or pick Version A to Z to print different sheets for neighboring desks. The answer key always matches.
Each card shows four numbers. Students combine all four, using each exactly once, with addition, subtraction, multiplication, division and brackets so that the result is 24. They write their expression on the line, and any correct expression counts.
Every card has at least one solution, and the answer key prints one. Choose cards with many solutions to start, cards with only one or two solutions, or cards that can only be solved by going through a fraction.
US Letter or A4, portrait: choose your paper size above. Print at 100 percent (actual size). Use "Black and white" for the copier, or "Color" for display pages and mini books.
Pairs that make 10, 20, 100 or 1000 (and the 9s, 99s and 999s), as missing-number sums or as subtraction.
Tick the boxes for every number a given number divides by, using the rules for 2, 3, 4, 5, 6, 8, 9 and 10.
Equations with one empty box, for addition, subtraction, multiplication, division or a mix.