(2.39-1.79)+ 6.49 -(4.29+89)
( 2 3/9 - 1 7/9 ) + 6 4/9 - ( 4 2/9 + 8/9 ) =
2 3/9 - 1 7/9 = 21/9 - 16/9 = 5/9
5/9 + 6 4/9 = 5/9 + 58/9 = 63/9 = 7
4 2/9 + 8/9 = 38/9 + 8/9 = 46/9 = 5 1/9
7 - 5 1/9 = 7/1 - 46/9 = 63/9 - 46/9 = 17/9 = 1 8/9
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(2.39-1.79)+ 6.49 -(4.29+89)
( 2 3/9 - 1 7/9 ) + 6 4/9 - ( 4 2/9 + 8/9 ) =
2 3/9 - 1 7/9 = 21/9 - 16/9 = 5/9
5/9 + 6 4/9 = 5/9 + 58/9 = 63/9 = 7
4 2/9 + 8/9 = 38/9 + 8/9 = 46/9 = 5 1/9
7 - 5 1/9 = 7/1 - 46/9 = 63/9 - 46/9 = 17/9 = 1 8/9