Table of Contents

Chapter 1 Time, Calendar, Ordinal Numbers, and Money

Lesson 1 Calculating Minutes Earlier in the Same Hour Page 1-2

Lesson 2 Calculating Minutes Later in the Same Hour Page 1-5

Lesson 3 Calculating the Correct Time in the Previous Hour Page 1-8

Lesson 4 Calculating the Correct Time in the Next Hour Page 1-12

Lesson 5 Calculating Correct Time When More Than One Hour Early Page 1-16

Lesson 6 Calculating Correct Time When More Than One Hour Late Page 1-20

Lesson 7 Ordinal Numbers Page 1-24

Lesson 8 Word Problems with Ordinal Numbers Page 1-27

Lesson 9 Calendar Page 1-28

Lesson 10 Understanding Leap Years Page 1-30

Lesson 11 Leap Year Word Problems Page 1-31

Lesson 12 Find the Day of the Week in a Leap Year Page 1-32

Lesson 13 Money: Converting Dollars to Quarters, Dimes, Nickels and Pennies Page 1-34

Lesson 14 Money: Converting Quarters, Dimes, Nickels and Pennies to Dollars Page 1-35

Chapter 2 Dividing by 6, 7, 8, and 9

Lesson 1 Grouping by 6 Page 2-2

Lesson 2 Division by 6 Page 2-3

Lesson 3 Grouping by 7 Page 2-8

Lesson 4 Division by 7 Page 2-9

Lesson 5 Division by 8 Page 2-12

Lesson 6 Division by 9 Page 2-16

Chapter 3 Division and Remainders

Lesson 1 Find the Missing Digits Page 3-2

Lesson 2 Division Puzzles Page 3-4

Lesson 3 Find as Many Missing Digits as Possible Page 3-6

Lesson 4 Using Remainders to Solve Word Problems Page 3-12

Lesson 5 More Using Remainders to Solve Word Problems Page 3-14

Lesson 6 Critical Thinking Using Remainders Page 3-17

Lesson 7 List All the Remainders Page 3-2

Lesson 8 The Least Remainder, Greatest Remainder, and Number of All Remainders Page 3-18

Lesson 9 Find the Least Divisor Page 3-20

Lesson 10 Critical Thinking Using Remainders Page 3-21

Lesson 11 More Critical Thinking Page 3-24

Chapter 4 Decimals

Lesson 1 Reading and Writing Decimals Page 4-2

Lesson 2 Multiplying a Decimal and a Whole Number Page 4-6

Lesson 3 Multiplying a Decimal by a Whole Number with 0 in the Ones Place or by a Whole Number with 0 in Both the Ones and Tens Places Page 4-7

Lesson 4 Multiplying Two Decimals Page 4-11

Lesson 5 Dividing a Decimal by a Whole Number Page 4-14

Chapter 5 Word Problems

Lesson 1 Word Problems for More Than One Half Page 5-2

Lesson 2 Word Problems for Less Than One Half Page 5-5

Lesson 3 Using Tally Marks to Solve Word Problems Page 5-8

Lesson 4 Using Marks in a Table to Solve Word Problems Page 5-12

Lesson 5 Critical Thinking: Using Lines to Solve Word Problems Page 5-14

Lesson 6 More Critical Thinking Page 5-17

Lesson 7 More Word Problems Solved with Lines Page 5-19

Lesson 8 Drawing Objects to Solve Word Problems Page 5-21

Lesson 9 More Drawing Objects to Solve Word Problems Page 5-23

Lesson 10 Critical Thinking Page 5-25

Lesson 11 More Critical Thinking Page 5-28

Lesson 12 Position Puzzles Page 5-31

Chapter 6 Patterns and Relationships

Lesson 1 The Rule of Patterns Page 6-2

Lesson 2 Using Division to Find Missing Parts of Patterns Page 6-4

Lesson 3 Using Multiplication to Find Missing Parts of Patterns Page 6-5

Lesson 4 Patterns in Digits Page 6-6

Lesson 5 Patterns in the Sums of Two Numbers Page 6-7

Lesson 6 Patterns in Fractions Page 6-9

Lesson 7 Patterns of Lines, Line Segments and Rays Page 6-10

Lesson 8 Patterns of Angles Page 6-11

Lesson 9 Patterns of Triangles Page 6-12

Lesson 10 Algebra Page 6-13

Lesson 11 Coloring Patterns Page 6-14

Lesson 12 Patterns in Decimals, Measurements and Time Page 6-15

Chapter 7 Algebraic Thinking

Lesson 1 Finding the Missing Digits in the Addends Page 7-2

Lesson 2 Finding the Missing Digits in the Minuend Page 7-5

Lesson 3 Finding Missing Digits in Minuend and Subtrahend with Borrowing Page 7-6

Lesson 4 More Finding Missing Digits Page 7-7

Lesson 5 Finding Missing Digits in Minuends and Subtrahends of Larger Numbers Page 7-8

Lesson 6 Finding Values for Variables in Addition and Subtraction Page 7-11

Lesson 7 Finding Values of Variables in Equations with Multiplication Page 7-12

Lesson 8 Replacing Symbols with Numbers Page 7-13

Lesson 9 o x o o = ? Page 7-14

Lesson 10 Finding the Value of o in an Equation Page 7-15

Lesson 11 Finding the Value of T in an Equation Page 7-17

Lesson 12 Finding the Value of Yin an Equation Page 7-18

Lesson 13 Critical Thinking: Finding Values for Symbols in Equations Page 7-20

Chapter 8 Dividing Two-Digit Divisors

Lesson 1 Two-Digit Dividend and Divisor with 0 in the Ones Place Page 8-2

Lesson 1 Two-digit Dividends and Two-digit Divisors Page 8-4

Lesson 1 Checking the Quotient Page 8-7

Lesson 1 What to Do When the Estimation is Too Large Page 8-8

Lesson 1 What to Do When the Estimation is Too Small Page 8-10

Lesson 1 Three-digit Dividends, Two-digit Divisors, and One-digit Quotients Page 8-11

Lesson 1 Three-digit Dividends, Two-digit Divisors, and Two-digit Quotients Page 8-14

Lesson 1 Writing Zero in the Quotient Page 8-16

Lesson 1 Dividends with More Than Three Digits Page 8-17

Lesson 1 Calculating When Dividend and Divisor Have Zeros in the Lower Places Page 8-19

Appendix – Road Map of Explore the Secrets of Math, Level 3 Book 1 Appendix –1