| Math Mojo - Making Math Meaningful |
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If you have learned L2R mental subtraction, you can test yourself here. There may be some examples in which you have to subtract with more than one carry in a row. If you don't know how to do that, take the interactive lesson for that here.
(Make sure you turn the sound on your computer on to get the full benefit if the test.)
return to lesson on L2R subtraction without more than one carry in a row
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