Here are a few websites to use to practice your subtraction skills.
Speed game – name the fact: http://www.oswego.org/ocsd-web/games/SpeedGrid/Subtraction/urikasub1res.html
Subtraction: http://www.amblesideprimary.com/ambleweb/mentalmaths/subtractiontest.html
Subtraction with and without regrouping: http://www.oswego.org/ocsd-web/games/Ghostblasters3/ghostsub3.html
Vertical 2 digit – 2 digit: http://www.slidermath.com/wjava/Subtv2.shtml
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