Add and Subtract Integers with Counters

Use the app to visualize each problem and record your answers in the box provided.
[list=1][*]3 + (-4) =[/*][*]3 - 4 =[/*][*]3 - (-4) =[/*][*]-4 - (-5) = [/*][*]-6 + 9 = [/*][/list]
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– Marshall Dinkins, John Ulbright

Information: Add and Subtract Integers with Counters