How much is the weight of each weight? My curriculum calls for 10g weights.

Thanks for your question. The weights on this are much lighter than 10g. However, we also sell a Demonstration Math Balance, which does have the 10g weights so would be perfect for your needs. Please look up Amazon number B014V0I902 and you will be able to find it, also from edx education. The link is: https://www.amazon.com/dp/B014V0I902. Hope this helps! Cheers, Linda

Is this two sided with a trey to support additional numerical cards?

Thank you for your question. This item is two sided with one side displaying large numbers while the other side has smaller numbers. This item does not include a trey for additional numerical cards. It does have a stand to hold the 20 small blue weights. Thanks again for your interest! Caitha (Learning Advantage)

How are the white "adjustment tabs" best used?

Hi there, The white adjustment tabs are used to make sure the scale is level (balanced) without any weight on it. Sometimes, the manufacturing process isn't exact and the scale can tip slightly one way or the other with no weights on it. Use those adjustment tabs to make sure the scale is perfectly balanced before adding any weight. Hope this helps. Best, Grant

edxeducation Student Math Balance | Includes 20 Weights | Beginner Addition, Subtraction and Equations | Early Math and Number Concepts Manipulative

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