IXL | Add a multiple of ten and a two-digit number | 3rd grade math

or

Add:

10 + 39 =

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or

$Confetti$

Excellent!

Now entering the Challenge Zone—are you ready?

Questions
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Time
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SmartScore
out of 100
IXL's SmartScore is a dynamic measure of progress towards mastery, rather than a percentage grade. It tracks your skill level as you tackle progressively more difficult questions. Consistently answer questions correctly to reach excellence (90), or conquer the Challenge Zone to achieve mastery (100)! Learn more

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Teacher tools

Work it out

Not feeling ready yet? This can help:

DD.3Use models to add a multiple of ten and a two-digit number