Quiz: Adding up to 4-digit numbers together Complete this quiz to understand how to add up to 4-digit numbers together. Then put your knowledge to the test.

Ubuntu is a free computer system, like Windows or macOS, but it’s built by a community. It’s great for programmers because it’s very flexible and has lots of tools already built-in that help you code.

Adding with regrouping If the two numbers in a place value column add up to ten or more, you must regroup. This means breaking a number up into thousands, hundreds and tens to help with the addition.

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