Find the sum : 10 2 3 1 + + 5 4 2 1 = = Find the sum : 3 5 2 2 + + 10 6 1 4 = = = Find the sum : 2 8 1 3 + + 3 4 1 4 = = = Find the sum : 3 2 4 1 + + 2 9 8 3 = = Find the Difference: 2 6 1 4 - - 3 4 1 1 = = = Find the Difference: 10 4 3 7 - - 1 2 5 8 = = Find the Difference: 10 3 7 4 - - 3 2 5 8 = = |