Times Table Memory can be played solo or in small groups competitively. Print or draw out two sets of cards. One set should have multiplication questions and the other set should contain the answers. Do not combine the sets, but shuffle them and lay them face down in two separate grids. The student flips over a question and an answer every turn. If the answer matches the question, the student keeps the card. If not, the student flips them back over and tries again. The first student with the most matches wins.
The "15" Game is best played with two players. Take 9 index cards and print each with a number 1 through 9. You can place the cards face up or down, depending on the age of the student and how difficult you want the task to be. Each student takes turns choosing a card. The first player who has three cards that add up to 15, wins.
Math War is ideal for all levels of students. It is played much like the traditional game of war, except that students perform math problems. Give two students a deck of regular playing cards. As soon as each flips over a card, they have to multiply them. For example, if one student turns over a 6 of spades and the other flips over a 2 of clubs, students have to race to multiply. The first to yell out 12, wins.
Use standard math flash cards. Have the students sit in a circle and choose one student to be the challenger. The challenger stands behind the first person and they are the first players. Show the players a flashcard; the first to answer the question correctly becomes the challenger and moves behind the next person in the circle. The loser takes the seat. The first student to make it around the circle and back to her seat, wins.