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Adding and subtracting decimals
Honestly, once you remember one very important rule, the rest of adding and subtracting decimals is a snap. That rule is to be sure and align your decimals first. In this tutorial, you'll get a chance to practice this with us and become fluent adding and subtracting decimals. Common Core Standard: 6.NS.B.3
Line those decimals up first. Careful!
Let's practice another adding decimal problem. We'll do it together.
We're adding 3 decimal numbers together in this example. Give it a try!
Add two numbers that are written to the tenths, hundredths, or thousandths place.
Just like when add, be sure you align decimals before subtracting.
In this example where we subtract decimals we do so up to the thousandths place. It's a little tricky, but not if we do it together.
Here's a simple word problem asking us to put our adding decimals skill to work. We sound like a broken record, but be sure and ALIGN DECIMALS.
Let's get fancy and practice adding and subtracting decimals in the same word problem.