4-Pan Algebra Balance Scale blue-organizer Its unique fine and ultra-fine

Its unique fine and ultra-fine nib combination is perfectly suited for accurate

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4-Pan Algebra Balance Scale blue-organizer Its unique fine and ultra-fineUnlike any other balance, this one makes it possible to physically show that 10. Weights placed on the outer pans represent negative integers and those placed in the inner pans represent positive integers. When you place a weight in each pan on one side of the center post, the balance remains level as ( 1) + (+1) = 0. Ideal for small group work, the balance comes with four plastic pans, four plastic canisters, a set of plastic weights and a Teacher's