Coding Colors Subtraction
Decode the shape values, solve each subtraction problem, and drag the correct numbers and coded shape answer into place.
Grade 1Subtraction Within 2010 roundsDrag & DropInstant feedback
A fresh code every game
The shape-number key changes when a new game starts, then stays the same through all ten rounds.
ABOUT THIS GAME
What does Coding Colors Subtraction practice?
Students use a visual code key to translate shapes into numbers, solve subtraction within 20, and translate each number and result back into a one- or two-shape code.
Subtraction Within 20
Practice first-grade subtraction facts with numbers and differences within 20.
Visual Coding
Decode each shape into its number value using the key.
Logical Reasoning
Connect the coded equation and the number equation.
Pattern Recognition
Read one- and two-digit answers as coded shape sequences.