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143 + 68 = 211
142 plus 1 makes 143
232
106.5 143 plus 70 is 213, divided by 2 is 106.5
71 plus 23 plus 49 is equal to 143.
Three - all nonzero digits are significant.
143
3
71.5 + 71.5 = 143
143 + 72 = 215
218
180+143-73 = 250