[
  "Align the decimal points. When a digit is too small to subtract, regroup: borrow 1 tenth as 10 hundredths.",
  "7.05 - 4.16: 5 hundredths cannot subtract 6 hundredths. Regroup: 7.05 = 6 ones 9 tenths 15 hundredths. 15 - 6 = 9 hundredths. 9 - 1 = 8 tenths. 6 - 4 = 2 ones. Result: 2.89.",
  "7.05 - 4.16 = 2.89. Answer: 2.89."
]