If the first digits of two numbers add to 10 and the second digits of each number are the same:
1. Multiply the two last digits times each other (if the answer is a
one-digit number, put a zero before it).
2. Multiply the two first digits times each other and add the last digit.
1 comments
If the first digits of two numbers add to 10 and the second digits of each number are the same:
1. Multiply the two last digits times each other (if the answer is a
one-digit number, put a zero before it).
2. Multiply the two first digits times each other and add the last digit.