74 + 35 + 16 + 45 =
= 74 + 16 + 35 + 45
= 70 + 4 + 10 + 6 + 30 + 5 + 40 + 5
= 70 + 10 + 4 + 6 + 30 + 40 + 5 + 5
= 80 + 10 + 70 + 10
= 80 + 10 + 10 + 70
= 100 + 70
= 170
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