3rd grade subtraction and balancing equations game - Earlier students learned how to subtract from small to large numbers. In this game students will learn how to subtract on one side of an equation and balance the equation on the other side by finding the missing number. For example there are problems in the following format: 3 � 2 = 8 - ?. Students will be required to find the value of the unknown value; this will be shown by a question sign in most cases. Solving subtraction and balancing equations is a useful algebra skill which will later be used in solving linear equations that are missing a variable. Students will also have fun playing this interactive online game known as the math slot machine game. This educational math quiz is for students in 3rd, 4th and 5th grades.