Lesson 1: Getting Ready to Multiply

Wrapping Up


Materials: The Grapes of Math by Greg Tang
Show your child the book The Grapes of Math by Greg Tang, and explain that this book presents a variety of math riddles that can be solved in different ways. Say, "Today, we're going to look at the first two riddles only. In the future, you'll try to solve some riddles on your own."

Begin with the first riddle, "Fish School." Read the riddle aloud, and ask, "How might you figure out how many fish there are without counting them?" As needed, explain that "askew" means "not straight." Turn the page as needed, and ask, "Do you see an array?" Give your child a chance to use the array to figure out how many fish there are. Provide help by asking, "What addition facts do you know that can help you with this repeated addition?" For example, if he knows 4+4 and 8+8, he may be able to figure out that there are 16 fish on the page.

Now, turn to the second riddle, "The Grapes of Math," and ask, "How might you use what you know about equal groups to figure out how many grapes are on this page?" and, if needed, "Is there a way to group these groups of grapes to create equal groups?" Your child should find that the grapes can be grouped in clusters of 10 (adding 7 grapes and 3 grapes), for a total of 5 groups or 50 grapes.

Solutions are provided in the back of the book.

Learning Gates

Have your child take the Learning Gates quiz for this lesson.