4.NBT.5 states: Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. This worksheet focuses on using the partial products method to solve a 2 digit factor by another 2 digit factor. This worksheet can be used as a practice sheet, homework, or an assessment. This worksheet