First Question:
"She thought she added 3 of that amount to make 3 batches"
One batch = 1.232 millimeters
She may have added 3 millimeters rather than multiplying it as she should have done.
3 Batches =
1.232 x 3
3.69600
3.696
Second Question:
16.007 - 0.55 = 10.507
That is incorrect because she moved the decimal point one more to the right, (which equals 5.5), and then subtracted that from 16.007. I found this out because 16.007 - 5.5 = 10.507
Doing the actual equation:
16.007 - 0.55 = ???
16.007
0.55
15.457
(For the second question equation, show your work using stack form)
Hope that helps! :)