Answer:
Part A:
Method B was solved incorrectly. The mistake that Sylvan made was in misinterpreting the problem. He used the number 12 as the value of one of the digits in the dividend, when it actually represents the number of bags of apples in the market.
Part B:
To solve the problem using Method B, we need to understand that the number 12 represents the number of bags of apples in one of the 64 bags. Therefore, we can find the total number of bags of apples by multiplying the number of bags by 12. This gives us:
64 x 12 = 768
Now, we can divide 768 by 10 to find the number of ten-pound bags of apples:
768 ÷ 10 = 76.8
Therefore, there are 76 ten-pound bags of apples in the market.
For Method A, Sylvan made no mistake, so there is no need to solve the problem again.