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Grade 2 MAP2D Trimester 1 Instructional Strategies Aligned to the 1997 California Content Standards Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 1 PROBLEM SOLVING WORDS add addition sum total plus in all in addition to increased by enlarged by multiply multiplied by times of by product at groups of each every gain rose greater than combine together subtract subtraction less than minus take away decreased by diminished by reduced by How many more than? How many fewer than? How many left? divide into quotient per parts distributed among How much for each? How many groups? Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 fewer than difference dropped loss of fractions each every 2 U P S Problem Solving Strategy “U-P-S” Understand: Read the problem and think about the question. Each word is important. Missing a word or reading it incorrectly could cause you to get the wrong answer. Plan: Think about how you can solve the problem. Look for key words and numbers. What do you need to do first? What do you need to do next? Solve: Follow your plan, working logically and carefully. Make sure you solved all steps needed to answer the problem. Be sure you answered the question asked. Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 3 2 MAP D SBA #1 Place Value Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 4 Let’s Write Numbers in Different Ways Hundreds Tens Ones 6 4 5 6 0 0 4 0 5 645 six hundred forty- five 6 hundreds 4 tens 5 ones Chapter 3 Lessons 4-5 Chapter 16 Lesson 4 600 + 40 + 5 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 5 Let’s Compare Numbers We can compare numbers using >, < and = signs. 25 30 35 32 25 26 27 28 29 30 31 32 33 34 35 Line up the numbers vertically 25 30 35 32 Start at the left to compare digits in the greatest place first. Highlight the digits in the first vertical column where the digits are different. Now compare these highlighted digits to compare the value. Chapter 4 Lesson 1 Chapter 17 Lesson 1 & 2 25 < 30 35 > 32 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 6 Let’s Compare Numbers ! Example # 1 30 + 5 35 35 = 35 Example # 2 47 3 tens 9 ones 47 > 39 Simplify the expression. Compare whole numbers using the symbols >, <, and =. Chapter 6 Lesson 4 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 7 Even & Odd Numbers 0, 2, 4, 6, 8 are even numbers 1, 3, 5, 7, 9 are odd numbers Chapter 4 Lesson 3 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 8 Let’s Find Even & Odd Numbers ! Make groups of two to decide if a number is even or odd. If there is none left over, the number is even. 6 xx xx xx If there is one left over, the number is odd. 7 xx xx xx x Chapter 4 Lesson 3 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 9 Let’s Find Even & Odd Numbers ! The one’s digit determines if the number is even or odd. Students will circle the one’s place. Example: 26 even xx xx xx 47 xx odd xx xx Chapter 4 Lesson 3 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 x 10 2 MAP D SBA #2 Addition Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 11 Addition with Regrouping 2 digits + 1 digit Write the 2 digits + 1 digit problem horizontally. Students rewrite the problem in “working form” while reading the problem aloud splitting the tens and ones in the two digit number. Ex. 35 + 8 = “Three tens, five ones” 3 5 “Down and to the left plus eight ones” + 8 “Equals” IAATF Trimester 2 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 Addition with Regrouping 2 digits + 1 digit Page 1 12 Let’s Practice 2-Digit Addition 3 + 1 8 Begin adding in the ones column. 9 Ask these questions: “Is the sum greater than 9?” “Is the sum a two digit number?” “Can the sum be split into tens and ones?” 3 1 3 8 9 + Ch 5 L 6 Ch 6 L 1 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 13 If the answer to the questions is YES then REGROUP. + 3 5 8 13 Orally split the sum into tens and ones while writing so the 1 ten is written FIRST and then the 3 ones. Ex. + 1 3 “One tens three ones” 5 8 3 Ch 5 L 6 Ch 6 L 1 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 14 Solve the tens column. 1 3 5 + 8 4 3 Rewrite the sum with the digits “together.” 1 3 5 + 8 4 3 43 Ch 5 L 6 Ch 6 L 1 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 15 2 MAP D SBA #3 Geometry Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 16 Triangle 3 sides and 3 vertices Rectangle 4 sides Polygons Use the shapes from the manipulative kits so students can explore polygons. Square 4 sides and 4 vertices Pentagon 5 sides Octagon Hexagon 6 sides 8 sides and 8 vertices Chapter 13 Lesson 1 Copyright ©, Long Beach Unified School District. All rights reserved. - Grade 2 17