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With money, if one wants to exchange their change for bills, all they need to do is roll coins up, and head to the bank! Likewise, when working with base blocks, cubes can be exchanged for longs, and longs for flats to reduce the loose cubes one has. This is a tricky concept to teach in elementary math but using this helpful place value worksheet can help! Encourage children to count all the tens on the left and determine which representation on the right can be traded as an equal number. To answer, trace the dotted line to the correct answer before finding the value of the base blocks shown.