Strategies for Mastering Math Facts JC Sanders Education Service Center Region 13 [email protected] 512.919.5420 Why do you think children struggle with memorizing basic math facts? The Problem They have not been taught _____________________ they can use for learning their basic facts. They have continued to practice math facts and take timed tests instead of developing their _______________ ________________ of the foundations of math. They lack ____________ ____________ and _______________ to manipulate numbers. Goal: Learn ways to develop basic fact fluency in students by constructing efficient mental tools and using conceptual strategies for fact retrieval. Define efficient drill. Grade 1st §111.3. 1.3 2nd §111.4. 2.4 §111.4. 2.6 Standard Objectives Adopted 2012 (A) model, create, and describe contextual multiplication situations in which equivalent sets of concrete objects are joined; and (B) add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations; (A) recall basic facts to add and subtract within 20 with automaticity; (E) explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences; (D) apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10; (C) compose 10 with two or more addends with and without concrete objects; TEKS Connections Number and operations. The student applies mathematical process standards to develop and use strategies for whole number addition and subtraction computations in order to solve problems. The student is expected to: Number and operations. The student applies mathematical process standards to develop and use strategies and methods for whole number computations in order to solve addition and subtraction problems with efficiency and accuracy. The student is expected to: Number and operations. The student applies mathematical process standards to connect repeated addition and subtraction to multiplication and division situations that involve equal groupings and shares. The student is expected to: Grade 3rd §111.5. 3.4 4th §111.6. 4.4 Standard Objectives Adopted 2012 (B) model, create, and describe contextual division situations in which a set of concrete objects is separated into equivalent sets. TEKS Connections Number and operations. The student applies mathematical process standards to develop and use strategies and methods for whole number computations in order to solve problems with efficiency and accuracy. The student is expected to: (A) solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operations, and the relationship between addition and subtraction; (E) represent multiplication facts by using a variety of approaches such as repeated addition, equal-sized groups, arrays, area models, equal jumps on a number line, and skip counting; Number and operations. The student applies mathematical process (F) recall facts to multiply up to 10 by 10 with automaticity standards to develop and use strategies and methods for whole and recall the corresponding division facts number computations and decimal sums and differences in order to solve problems with efficiency and accuracy. The student is expected to: (A) add and subtract whole numbers and decimals to the hundredths place using the standard algorithm; (B) determine products of a number and 10 or 100 using properties of operations and place value understandings; (C) represent the product of 2 two-digit numbers using arrays, area models, or equations, including perfect squares through 15 by 15; Grade 5th §111.7. 5.3 Standard Objectives Adopted 2012 (E) solve for products of decimals to the hundredths, including situations involving money, using strategies based on place-value understandings, properties of operations, and the relationship to the multiplication of whole numbers; (D) represent multiplication of decimals with products to the hundredths using objects and pictorial models, including area models; (C) solve with proficiency for quotients of up to a four-digit dividend by a two-digit divisor using strategies and the standard algorithm; (B) multiply with fluency a three-digit number by a two-digit number using the standard algorithm; (A) estimate to determine solutions to mathematical and real-world problems involving addition, subtraction, multiplication, or division; (D) use strategies and algorithms, including the standard algorithm, to multiply up to a four-digit number by a onedigit number and to multiply a two-digit number by a twodigit number. Strategies may include mental math, partial products, and the commutative, associative, and distributive properties; TEKS Connections Number and operations. The student applies mathematical process standards to develop and use strategies and methods for positive rational number computations in order to solve problems with efficiency and accuracy. The student is expected to: 6th Number and operations. The student applies mathematical process §111.26. standards to represent addition, subtraction, multiplication, and 6.3 division while solving problems and justifying solutions. The student is expected to: (D) add, subtract, multiply, and divide integers fluently; and (E) multiply and divide positive rational numbers fluently. Explanation Representation Addition & Subtraction Math Strategies Zero Addition Strategy Any fact with zero as an addend Zero Subtraction Facts Any fact with zero as the subtrahend Any fact with 1 as an addend & 2 + 3, 2 + 4, 2 + 5, 2 + 6, 2 + 7, Count-on Addition 3 + 2, 4 + 2, 5 + 2, 6 + 2, 7 + 2, 5 + 3, 6 + 3, 3 + 5, 3 + 6 Any fact with 1 or 2 as Count-back the subtrahend Subtraction 9 – 8, 8 – 7, 7 – 6, 6 – Difference of 1 5, 5 – 4, 4 – 3, 3 – 2, 2 Subtraction –1 To Drill or Not to Drill Training Region 13 Facts 3+ 4, Doubles Plus 1 7+ Addition 9, Explanation Representation Addition & Subtraction Math Strategies Strategy Make 10 Subtraction 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5, 6 + 4, 7 + 3, * Make 10 Addition + 2, 9 + 1 10 – 9, 10 – 8, 10 – 7, 10 – 6, 10 – 5, 10 – 4, 10 – 3, 10 – 2, 10 – 1 3 + 2, 5, 5 + 6 + 7, 7, 8 + Doubles Subtraction 1 + 1, 2 + 2, 3 + 3, 4 + 4, 5 + 5, 6 + 6, 7 + 7, Doubles Addition 8 + 8, 9 + 9, 10 + 10 2 + 3, 3, 4 + 6 + 5, 8, 8 + 2 – 1, 4 – 2, 6 – 3, 8 – 4, 10 – 5, 12 – 6, 14 – 7, 16 – 8, 18 – 9, 20 – 10 1 + 2, 4, 4 + 5 + 6, 6, 7 + 9+8 To Drill or Not to Drill Training Region 13 9 – 6, 8 – 5, 7 – 5, 6 – 4, 5 – 3, 8 – 6, 9 – 7 7 – 3, 7 – 4, 9 – 5, 9 – 4, 11 – 5, 11 – 6, 13 – 6, 13 – 7, 15 – 7, 15 – 8, 17 – 8, 17 – 9 10 Minus 1 Addition Difference of 2 or 3 Subtraction Doubles Plus 1 Subtraction Explanation Representation Addition & Subtraction Math Strategies Any fact with 9 as a addend Minus 10 Plus 1 Subtraction Strategy Any fact with 9 as the subtrahend Difference of 9 Subtraction Facts 11 – 2, 12 – 3, 13 – 4, 14 – 5, 15 – 6, 16 – 7, 17 – 8 To Drill or Not to Drill Training Region 13 – – – – Facts 11 12 12 14 – – – – 4, 4, 7, 6, 11 12 13 14 – – – – Strategy 10 Plus More Subtraction Explanation Representation Addition & Subtraction Math Strategies 3, 5, 5, 8 4 + 7, 4 + 8, 5 + 8, 6 + 8, 7 + 4, Make 10 Plus More 8 + 3, 8 + 4, 8 + Addition 6 8, 7, 8, 8, 3 + 8, 7, 5 + 7 + 5, 5, 8 + 11 11 12 13 To Drill or Not to Drill Training Region 13 Multiple Representations Draw an equal groups model for 5 ×3 Draw an array for 5 ×3 Draw an area model for 5 ×3 Draw a number line for 5 ×3 Any fact with 2 as a factor or a divisor Any fact with 1 as a factor or a divisor Any multiplication fact with zero as a factor 10’s Facts 2’s Facts 1’s Facts 0 Facts Explanation Representation Multiplication & Division Math Strategies Any fact with 10 as a factor or a divisor 5’s Facts Strategy Any fact with 5 as a factor or a divisor Square Facts Facts Any fact where the factors are the same or the divisor and quotient are the same To Drill or Not to Drill Training Region 13 Any fact with 6 as a factor or a divisor Any fact with 3 as a factor or a divisor Any fact with 9 as a factor or a divisor 7’s Facts 6’s Facts 3’s Facts 9’s Facts Explanation Representation Multiplication & Division Math Strategies Any fact with 7 as a factor or a divisor 4’s Facts Strategy Any fact with 4 as a factor or a divisor 8’s Facts Facts Any fact with 8 as a factor or a divisor To Drill or Not to Drill Training Region 13 Resources Double ten-frame 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Hundreds Chart NAME ___________________________ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 © 2008 National Council of Teachers of Mathematics http://illuminations.nctm.org Place Value Chart thousands hundreds tens ones References Van de Walle, John A. (2006). In Teaching Student Centered Mathematics Grades 3 -5. Boston: Pearson Education, Inc. ISBN 0-205-40844-3 Fosnot, C. (2001). Young Mathematicians At Work. Constructing Number Sense . Burns, M. (2007). About Teaching Mathematics: A K-8 Resource. Math Solutions Publications. Sausalito, CA. O’Connell, S. & SanGiovanni, J. (2011). Mastering the Basic Math Facts in Addition and Subtraction: Strategies, activities, & interventions to move students beyond memorization. Heinemann. Portsmouth, NH. Schielack, J. (2009). Focus in grade 3: teaching with curriculum focal points. (pp. 01-23). United States of America: National Council of Teachers of Mathematics. DOI: www.nctm.org Schielack, J. (2009). Focus in grade 4: teaching with curriculum focal points. (pp. 01-11). United States of America: National Council of Teachers of Mathematics. DOI: www.nctm.org Woodward, John. (2004). Fact Fluency & More: Addition, Subtraction, Multiplication & Division Computational Skills Practice. Sopris West Education Services. How can the FACTastic Math Strategy System help your students master the basic math facts? The FACTastic Math Strategy System creates an engaging way to teach your students math facts by providing strategies for solving problems rather than expecting students to rely on memorization. Each card in the set contains a visual cue around a strategy for solving math facts. These cards are also helpful for parents to continue their children’s learning at home! The FACTastic Math Strategy system includes: • over 25 Strategies • over 400 Strategy Cards • instructional player’s guides on how to introduce and work with each strategy • suggestions for effective practice Available sets include: • Addition/Subtraction Edition • Multiplication/Division Edition See the FACTastic Math Strategy Cards in action! Scan the QR code or view a video about using the cards in your classroom. Complete your FACTastic Math Strategy System with the Multiplication/ Division Edition! To order, visit http://store.esc13.net! For more information, contact JC Sanders, 512.919.5420, [email protected]
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