Real math help.
How Do You Regroup Numbers to Add Decimals Mentally?
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Adding numbers mentally is easier than you might think! It can be a quick and fun skill! This tutorial shows you how to take decimals and add them mentally.
Background Tutorials
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Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
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What is the Commutative Property of Addition?
When you're adding numbers together, does their order matter? This tutorial can answer that question! It looks at the Commutative Property of Addition!
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Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
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What is Place Value?
Did you know numbers have place values? This tutorial introduces you to the term place value and shows you some of the most seen place values. Take a look!
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Fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation.
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How Do You Add Decimals?
Doing math with paper and pencil can come in real handy, so make sure you're comfortable adding decimals by hand. After all, you don't want the calculator to be a crutch!
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Further Exploration
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Fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation.
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How Do You Subtract Decimals?
Doing math with paper and pencil can come in real handy, so make sure you're comfortable subtracting decimals by hand. After all, you don't want the calculator to be a crutch!
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