This video gives examples of how to add large integers. When adding large integers, avoiding mistakes and remembering to carry over when necessary is key. Make sure to line up each place value column exactly and line up decimals the same way.

Addition is the simplest of the mathematical operations, so the only real key to adding 2 large integers is avoiding mistakes and remembering to carry over where necessary.

Let’s look at some examples. In this first one we have 922 plus 81. Now the first part of avoiding mistakes is making sure you’ve lined up your 2 numbers properly. The ends where the decimal points would go need to line up.

Then we can just add vertically, we have 2 and 1 which equals 3, 8 and 2 which equals 10, which means we put a 0 here and carry the 1, and then we add 9 and 1 which is another 10. In the second example we have 3581 and 1544.

Once again we’ve lined up the ends, 1 plus 4 is 5, 8 plus 4 is 12, so we have a 2 here, and we carry a 1. 1 plus 5, plus 5 is 11, so we have a 1, and we carry another 1. Then 1 plus 3, plus 1 is 5. In this final example we have 3769 and 2257.

Once again we’ve lined up the ends, and so we’ll add vertically. 9 plus 7 is 16, so we have a 6, and a 1 carried. 1 plus 6, plus 5 is 12, so we have a 2, with another 1 carried. 1 plus 7, plus 2 is 10, 0, with the 1 carried. 1 plus 3, plus 2 is 6.

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by Mometrix Test Preparation | Last Updated: August 15, 2019