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One atta Time

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Problem Styles
3 addends & 2 addends ( 2 + 3 + 4 = 4 + 5 ) 2 addends & 2 addends ( 2 + 3 = 4 + 1 ) 2 addends & 2 subtrahends ( 2 + 3 = 9 - 4 ) 3 addends & 2 subtrahends ( 2 + 3 + 4 = 20 - 11 ) 2 subtrahends + 2 subtrahends ( 10 - 4 = 9 - 3 )