Mathematics decks

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by Tim Bottman on Mar 11, 2014
This strategy is used for facts that have a 1 or a 2 as one of it’s addends (example: 8 + 2). Out of the 100 addition facts students will learn, 36 fall under the one-more-than and two-more-than facts. In these situations, students simply count up 1 or 2 from the greatest addend. This should be the only situation where students “count” to find their answer.
by Tim Bottman on Mar 11, 2014
These facts all have at least one addend of 8 or 9. One strategy for these facts it to build onto the 8 or 9 and up to 10 and then add on the rest. For 6 + 8, start with 8, then 2 more makes 1-, and that leaves 4 more for 14.
by Tim Bottman on Mar 11, 2014
This set of facts includes all the turn-around facts for the doubles. Students should use their knowledge of addition and fact families to solve these facts. For example, when solving 8 - 4, the student should ask, “What plus 4 equals 8?”.
by Tim Bottman on Mar 11, 2014
This level includes a review of all facts plus 6 facts that have not been covered by any strategies.
by Tim Bottman on Mar 11, 2014
This set of facts includes all the turn-around facts for facts of one more than and two more than. The answers to all of these facts will be 1 or 2. Students should use their knowledge of addition and fact families to solve these facts. For example, when solving 7-2, the student should ask, “What plus 2 equals 7?”.
by Tim Bottman on Mar 11, 2014
Near 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.
by Tim Bottman on Mar 11, 2014
This set of facts includes all of the addition and subtraction facts.
by mafc on Sep 24, 2020
Multiplication up to 10 x !0