IXL | Subtract by counting back - up to 20 | 2nd grade math

or

Count back to subtract. The number line shows how.

10

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20

19

–

4

=

ref_doc_title.

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? These can help:

J.1Subtract by counting back - up to 10

GG.4Number lines - up to 20