Subtract a 1-digit number from 2 digits (timed)
Subtract a 1-digit number from a 2-digit number.
Subtract a 1-digit number from 2 digits (timed)
Subtract a 1-digit number from a 2-digit number.
Subtract a 1-digit number from a 2-digit number.
Subtract a 1-digit number from a 2-digit number.