"Okay," David said, making a split-second decision that changed the mood entirely. "Let's use the book."
The Kumon C answer book is not meant for students to copy from directly. Instead, it helps: kumon answer book c math
Leo did the mental jump. "I just add another seven!" He scribbled the calculation on his scratch paper. 35 + 7. "It's 42!" "Okay," David said, making a split-second decision that