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52 - 17 = - 44
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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 )
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