Question

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?
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.