Large Sums Worksheets
Large digit sums indeed can be a bit difficult to solve, especially if you are trying to solve it in your mind. Often students find it difficult to solve sums in mind and struggle with mental math, especially if the sums involve numbers with multiple digits or if students try to solve more than two numbers simultaneously. Large sums can be of both types, either you can have large digit numbers, or you can have multiple numbers that are to be added simultaneously. Practicing the addition of large sums in written form or your mind can be easy if you continue with this practice. Mental math, especially, is a tool that gets better and better with continuous practice. Practicing large sums is a bit difficult in the beginning, so students, for their convenience, can always try to break the larger numbers into smaller numbers and then add them. Afterward, when they feel that they have practiced enough, they can try adding large numbers without breaking them down. The addition is a pretty simple mathematical technique to learn. However, it can also be a bit tough if at times if the number of digits is increased. During the elementary grades, students are taught to add simple one or twodigit numbers. However, in relatively higher grades, students are expected to solve a few complex sums involving three or more digits. Adding two tripledigit numbers is not that difficult either if you do it very carefully. Doing a complex sum or adding two tripledigit numbers can be made easy if it is done in steps. Solving a tripledigit addition sum is a step by step process. The first step is to write all the place values in their own respective columns. Then add each digit of their respective columns and write their answers in those very columns. Things can get messy if you are adding large digit sums and not following the particular guidelines such as writing digits in columns. Start adding from the right and then move to the left side of the sum column by column. Carry the excess part of the answers carefully to the top of the right columns.

Basic Lesson
Demonstrates how to add ones to thousands columns. Also includes practice problems.
View worksheet 
Intermediate Lesson
Demonstrates how to add ones to thousands columns. Displays the concept of carrying between columns.
View worksheet 
Independent Practice 1
Contains 15 problems. The addition of 3 large numbers. The answers can be found below.
View worksheet 
Independent Practice 2
Contains 15 problems. The addition of 3 large numbers. The answer key is below.
View worksheet 
Adding Large Sums Quiz
10 large sum math problems. A math scoring matrix is included.
View worksheet
Yet, another cheesy attempt at an addition joke:
If one is lonely, two's company and three is a crowd, what's four and five? Nine!