Multiply by 7 using the grouping of objects, arrays, and facts you already know. Explore the Multiply by 7 facts using the grouping of objects and arrays. Compete against characters to see who finds ...

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Want to be great at math and impress everyone with your quick thinking? You've found the perfect place! Forget boring memorization and long calculations; get ready for a fun journey where math becomes ...

You're on the trading floor, trying to price out if a 15-year bond issued by General Electric will generate the returns needed to placate your investors. Bad news, your calculator is dead and the ...