Students explore subtraction concepts through coin-based equations. Learners match values to coin groups while practicing subtraction with money. Adjustable levels vary coin combinations for differentiated practice. Supports TEKS 2.5.A (determine coin values) and aligns with Common Core 2.MD.C.8, 2.NBT.B.5 (subtraction).
Skills: subtraction, coin values, mental math, problem-solving. Ideal for connecting math operations to real-world money.