The only option that explains the mistake Jill made in the model is;
Option A; Jill used 3 groups of 3 tenths and 2 hundredths rather than 4 groups.
- The model Jill made is to show the quotient of 1.28 ÷ 4.
Now, this means she wants to divide 1.28 into 4 equal parts. Thus, the model must show 4 identical quotients.
The image of the model we are seeing from Jill is showing;
3 groups of 3 tenths and 2 hundredths.
Since it is showing 3 groups instead of 4 groups, the it is clear that Jill made a mistake in her model.
In conclusion, the only option that identifies the mistake correctly is option A.
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