[
  "When subtracting decimals, align the decimal points. Subtract ones from ones, tenths from tenths.",
  "Ones: 4 - 2 = 2. Tenths: 7 - 6 = 1. Combine them: 2 ones + 1 tenth = ?",
  "4.7 - 2.6 = 2.1. Answer: 2.1."
]