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About | Khan Academy
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.
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Add and subtract mixed numbers (no regrouping) (practice) | Khan Academy
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"It's amazing, and it's free. It's free!" – LaToya Grubbs, middle school teacher, Georgia. Join Khan Academy today to help every student succeed with personalized practice. | Khan Academy
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"It's amazing, and it's free. It's free!" – LaToya Grubbs, middle school teacher, Georgia. Join Khan Academy today to help every student succeed with personalized practice. | Khan Academy
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15 reactions · 11 shares | Calling all teachers! 戮Khan Academy offers K-14 standards-aligned content in math, science, history, art and more. We have 50,000+ practice problems for remediation and enrichment. Free for teachers and students! | Khan Academy | Facebook
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