Rules of Divisibility. How did we decide what they were? That’s where we are headed in our math journey at the moment. I’ve talk about going back, reviewing, revisiting, or doing an activity more than once. This repetition brings depth to our math journey. We are doing just that again in preparation for reducing fractions…
Tag: multiples
The Shapes of Numbers — Exploring Prime Numbers through Eratosthenes’ Sieve
The sieve of Eratosthenes is one of my favorite math exercises to do with kids, and it’s a great intro into prime numbers. It eliminates numbers through the multiples, leaving primes on the 100 chart. We usually use block crayons, because there is a definite pattern on the 100 chart for multiples, and block crayons…
Patterns in the Multiplication Chart
*A note about the numbers. In this piece to try to keep things clear, when I speak of the multiples or a particular number, I am writing the numeric symbol for the number i.e. “9.” If I am not talking about the number but describing an amount, I am spelling it out i.e. “three…