What is the first step when multiplying a two-digit number by another two-digit number using partial products?

Multiply the ones digit of the bottom number by each digit of the top number.

Why do we sometimes need to 'carry' digits during the multiplication process?

We carry digits when the product of two digits is a two-digit number.

Add the partial products together.

I can multiply two-digit numbers by two-digit numbers using partial products.

1
When multiplying a multi-digit number by another multi-digit number, you multiply each digit of the bottom number by each digit of the top number.
2
When multiplying multi-digit numbers, you will have multiple answer lines that need to be added together to get the final answer.
3
When you start a new answer line, you need to add a zero as a placeholder, and the number of zeros depends on the place value of the digit you are multiplying by.