# Mathematics decks

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**Tim Bottman**on Dec 30, 2014Learn to differentiate between obtuse, acute, and right angles with these flashcards created for elementary learners.

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**Tim Bottman**on Feb 13, 2015Practice your double digit subtraction with these flashcards created for fourth grade math learners.

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**Tim Bottman**on Feb 13, 2015Practice your double digit addition with these flashcards created for fourth grade math learners.

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**Tim Bottman**on Dec 02, 2014Factors for the numbers 1 through 25. Geared for fifth grade level.

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**Tim Bottman**on Mar 11, 2014This set of facts includes all the turn‐around facts for the nines facts. Students should use their knowledge of multiplication and fact families to solve these facts.

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**Tim Bottman**on Nov 06, 2014These flashcards are for the Roman Numerals 1-20 and are suitable for elementary school children.

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**Tim Bottman**on Mar 11, 2014Near doubles are also called the “doubles-plus-one” facts and include all combinations where one addend is one more than the other. There are 18 of these facts. When students realize that these are facts that have addends with a difference of 1 (1 + 2), (3+ 4), (5 + 6) etc. they simply double the smaller addend and add 1.

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**Tim Bottman**on Jan 14, 2015Quick Flashcard deck for practicing the factoring of numbers. Created for fourth grade level