Multi-digit multiplication (5th grade)

The multiplication algorithm works the same way with 5 and 6-digit numbers as with shorter numbers. :) First, it makes sense to estimate the final answer, so you can catch gross errors in multiplication. The lesson continues here with an example of how to multiply a money amount: This lesson is part of the Math Mammoth Grade 5 curriculum: Free online practice of multi-digit multiplication: See more 5th grade math videos here: