Jaime is using a thinking stratey to compute the sum of 8+7. He thinks, "8+8 =16, so I can figure out this problem." He arrives at the answer 17. He is most likely making an erro in which of the following strategies?

Question

one more or one less than a known fact, counting back, counting on, or compensation?

Answer 1

Jaime is most likely making an error in the "one more or one less than a known fact" strategy. He correctly identifies the known fact of 8 + 8 = 16, but when he uses that to deduce 8 + 7, he should recognize that 7 is one less than 8, so he should subtract 1 from 16 to get the correct answer of 15. Instead, he arrives at 17, indicating he misapplied the strategy.