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Single Digit Whole Number Addition FlashCards
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The Whole Numbers are the natural numbers (1, 2, 3, …), and the number zero (0).
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When we add zero (0) to any number, the result (sum) is the number that zero was added to, regardless as to whether zero was added to the original number before it, or after it. The rule reads: 0 + a = a or a + 0 = a So = 9 and = 4
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When we add two numbers, the order doesn’t matter; that is, the sum (result) is the same.
The rule (of Commutivity for Addition) states: a + b = b + a Just as = 8, it is also true that = 8 .
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You may have remembered being asked to memorize whole number addition facts in grade school.
The next slide is a table of sums of whole numbers 0 through 9
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Å 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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To use this table, simply take any number
in the top row and any number in the first column, and their sum can be found where that row and column intersect. Notice that the sum : = 12 can be found by using the above mentioned process with the table… see next slide…
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Å 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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The next 55 slides will be randomly mixed “flash cards” for adding single digit whole numbers, which drill & practice the facts from the addition table we just reviewed. The answers will be revealed (UPSIDE DOWN) two seconds after the “flash card” pops up Use the “NEXT” button (below on the right) to get more “flash cards”. If you wish to end the session, use the “END” button (below on the left)
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Wow! You actually reviewed every one of those 55 addition problem flash cards… Good for you! Come back anytime to review these addition facts, if you begin to feel rusty, OK? Close the document by first pushing the “ESC” (Escape) button in the top left corner of your keyboard, and then click on the red in the top right corner of the dialog box.
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Thank you for reviewing your addition facts… May the force
be with you… Close the document by first pushing the “ESC” (Escape) button in the top left corner of your keyboard, and then click on the red in the top right corner of the dialog box.
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