Better Lesson
Better Lesson: Divisibility Rule for 4 and 5
Using calculators allows students to experiment and to discover patterns, in this case resulting in a divisibility rule for the number 4.
Better Lesson
Better Lesson: Divisibility Rules for 2 and 3
Sixth graders will work with calculators to discover the divisibility rules.
Texas Instruments
Texas Instruments: Divisibility Rules! Using Scientific Calculators
Concepts and skills covered in this activity include number theory, divisibility rules, multiples, factors, and problem-solving skills.
Better Lesson
Better Lesson: Divisibility Rules for 6 and 9
Sixth graders use calculators to find the shortcut for dividing with 6 and 9.
Mathigon
Mathigon: Math Foundations: Divisibility and Primes: The Distribution of Primes
This lesson focuses on the distribution of large prime numbers. It offers a calculator to check numbers for prime and a calculator that allows you to create prime numbers. It also provides the history of methods find the distribution of...
National Council of Teachers of Mathematics
The Math Forum: Beat the Calculator: Adding Even Numbers
Can you beat the calculator? Your task is to find the sum of all even numbers between two and any selected two-digit even number. If you can find the number pattern, you are sure to beat the calculator every time. Links to other "Beat...
Calculator Soup
Calculator Soup: Lcm Calculator Least Common Multiple
The Least Common Multiple (LCM) is also referred to as the Lowest Common Multiple (LCM) and Least Common Divisor (LCD). For two integers a and b, denoted LCM(a,b), the LCM is the smallest positive integer that is evenly divisible by both...
AAA Math
Aaa Math: Ratios
This resource describes how to calculate ratios and provides an opportunity for students to practice the skill.