What numerals would be underlined in the problem

![8102|57x42](upload://zk4QwvFqBWcSz0sBdx6xPkLEonG.jpg) Why does the text recommend underlining these numerals?


42 would be underlined in the problem . Underlining the 42 shows the students which part of the problem to work first. Underlining the 42 also shows students where to write the first digit of the quotient (above the last numeral that is underlined).

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