Dear Parents: “A Math Book that Your Child Can Solve on Their Own” 3
Dear Students: “If Possible, Can You Solve the Problems Alone?” 5

Part 1??Tree Log 10

I Met a Math Zombie 13
My Deal with the Math Zombie 34
How Many Pieces? 40
I Can Cut Several Logs at Once 58
Mom Signed Me Up for the Math Club 68
Teacher Cho’s Talk Talk: Cut and Leftover 73
Meeting Eunbi Again 74
How Much Remains After Cutting? 78
I Was Almost Late for the Math Club 84
Teacher Cho’s Talk Talk: It’s Multiple Questions 88
Special: What Would It Look Like If You Draw Like this? 89
Tree Logs of Different Sizes 90
The Rising Star of the Math Club 111
Special: It Has An Interesting Shape 116
Teacher Cho’s Talk Talk: There Are Identical Tree Logs 117
Let’s Change the Tree Log! 118
Special: Did You Realize the Problems Are Similar to the Tree Log Problem? 138
Math Club: Still a Chill Vice President 139

Part 2??Can You Fold It? 144

Teacher Cho’s Talk Talk: Let’s Cut the Thread 146
Focus on How Many Times the Thread is Cut 147
Special: Wrap the Thread Around the Scissors and Cut 163
Awaiting the Math Club 165
Special: You Have to Solve with the Definition of Line Segment 169
Teacher Cho’s Talk Talk: Do You Know the Difference in Counting Numbers Starting at 0 and 1, Respectively? 170
Teacher Mole Knows My Name 171
Counting Numbers from One 179
Special: Solve by a Definition of Counting 186
Counting from Zero 187
Oreum Even Solves Difficult Problems! 192
Special: It’s Not a Nonsense Problem 195
Teacher Cho’s Talk Talk: Fold the wire to Make the Shape 196
Finally Learning Shapes 197
Teaching Minseok 214
Special: The Sheep Wants to be Free 218
Teacher Cho’s Talk Talk: How Many Stakes Are There? 219
Support with a Stake So That It didn’t Line Up 220
Even Minseok Gets a Hundred 243
Special: It’s a Nostalgic Matchstick Problem 254
Answers 255