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.
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...
AAA Math
Aaa Math: Ratios
This resource describes how to calculate ratios and provides an opportunity for students to practice the skill.