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Ch. 10 Helping Students Master the Basic Facts

Ch. 10 Helping Students Master the Basic Facts. Vocabulary. Reasoning Strategies for Addition Facts. One More Than and Two More Than: an addend of one or two Adding Zero: an addend of zero Using 5 as an Anchor: look for fives in the numbers in the problem

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Ch. 10 Helping Students Master the Basic Facts

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  1. Ch. 10 Helping Students Master the Basic Facts Vocabulary

  2. Reasoning Strategies for Addition Facts • One More Than and Two More Than: an addend of one or two • Adding Zero: an addend of zero • Using 5 as an Anchor: look for fives in the numbers in the problem • Make 10: combinations that make ten • Up Over 10: use known facts that equal ten and then add the rest of the numbers onto ten • Doubles: a number added by itself • Near-Doubles: double the small number and add one or double the larger number and subtract one

  3. Reasoning Strategies for Subtraction Facts • Subtraction as Think-Addition: use known addition facts to produce the unknown quality or part • Down Over 10: use what they know to figure out a related fact • Take from the 10: When the starting value is more than 10, break it down to 10 plus the number that makes up the starting value. Then subtract the 10 from the second value and add it to the number that makes up the starting value.

  4. Reasoning Strategies for Multiplication and Division Facts • Doubles: same as doubles in addition (a number added by itself) • Fives: all facts with 5 as the first or second factor • Zeros and Ones: any number multiplied by zero is zero (groups multiplied by zero items) and any number multiplied by 1 is the same number (groups multiplied by 1 item) • Nifty Nine: facts with a factor of 9 (several different strategies and patterns) • Division Facts: think multiplication and then apply a multiplication reasoning fact as needed

  5. Talk, Talk, Talk, Talk, Talk, Talk Grab a partner. Have on person facing the projector and the other student with their back to the projector. A category will be shown on the projector, which both students can look at. The list of terms will then be revealed so the student who isn’t facing the projector can no longer look. The person seeing the terms will then describe them without saying the terms themselves. The person must continue talking until his/her partner has guessed all the terms.

  6. Reasoning Strategies for Addition Facts “One More Than” “Two More Than” “Adding Zero” “Make 10” “Using 5 as an Anchor” “Up Over 10” “Doubles” “Near-Doubles”

  7. Reasoning Strategies for Subtraction Facts “Subtraction as Think-Addition” “Down over 10” “Take from the 10”

  8. Reasoning Strategies for Multiplication and Division Facts “Doubles” “Fives” “Zeros and Ones”

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