Customize the worksheets in various ways (difficulty level, spacing, font size, number of problems.) Generate free, printable worksheets for prime factorization or for finding all the factors of a given number. Available as a download ($7.40) and also as a printed copy. Type in a missing number to the factor tree, and the program will find the other factor, and continue drawing the tree as needed.Įat factors, multiples, and prime numbers in this remake of the classic game.Ī self-teaching worktext for 5th grade that covers multi-digit multiplication, long division, problem solving, simple equations, ratios, divisibility, and factoring. en/nav/ frames_asid_158_g_3_t_1.html?open=instructions To find all prime numbers below a given number, use a sieve of Eratosthenes to 'weed out' all the composite numbers.Īn Another interactive sieve of EratosthenesĬlick on a number to remove its multiples from the grid. Move counters up the legs of an octopus but only when the number on the circle is a multiple of the number on the card.Ī millionaire game where the questions have to do with factors, prime numbers, and the greatest common factor.Ĭhoose a number that is NOT a factor of the given number.įor each number you factorize, you'll get to grow a tree in your forest! You can choose between 6 different trees, also.įactor numbers to their prime factors using an interactive factor tree, or find the GCF and LCM of numbers.

Number 1 is only supposed to be used to capture a prime number. Slide a number over another to capture it, if it is a factor of the other. Activity.aspx?id=4134Įat factors of the given number, and avoid numbers that are not factors of the given number in this Pacman-style game. You can play against the computer or against a friend. Drag rectangles to show the factorizations of a givenĪ fun, interactive game where you practice divisibility among numbers 1-100.

Greatest common factor dice game