buckle my shoe,
open the door
to the world
I often think of my grandpa, Benjamin Cohn, who tirelessly and happily read and recited nursery rhyme after nursery rhyme to me as he rocked me in his lap...I sat on his lap more gently once I was in college. He rocked many children through the years. Although he had only an eighth grade education, he was smart, well-read, highly respected and he laid down the foundations for life-long learning. He was a major influence in my life and also the kindest man I have ever met. Grandpa was loved by all and his memory is alive in the hearts of all who knew him.
- 3.2: Numeration Systems
- In this exercise set, you will learn about two ancient numeration systems –those of the Chinese and Mayans.
- 3.3: Trading and Place Value
- You will be exploring more about place value in this exercise set.
Thumbnail: The abacus is a calculating tool that has been in use since ancient times and is still in use today. The abacus consists of a number of rows of movable beads or other objects, which represent digits. One of two numbers is set up, and the beads are manipulated to implement an operation involving a second number (e.g., addition), or rarely a square or cubic root. (Unsplash Lisense; Crissy Jarvis via Unspash)