8 half-sheets to explore numbers 20 - 99.
1 chart to record prime numbers that were found
4.OA.4 - Find all factor pairs for a whole number in the range 1-100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1-100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1-100 is prime or composite.
Prime and Composite
Task Cards that allow students to work their way towards finding all PRIME numbers between 1-99. The numbers have been grouped in tens and strategies will be used to eliminate composite numbers.
This can be done in centers, in groups, in pairs, or as an ongoing task!