To find the difference between 39.4 and 1.7, we can use the subtraction operation. Here's the step-by-step process:
Write the numbers down in a vertical format, aligning the decimal points:
39.4
- 1.7
Subtract the digits in the ones place:
39.4
- 1.7
-----
7
Subtract the digits in the tenths place:
39.4
- 1.7
-----
7.7
Since there are no more digits to subtract, the result is:
37.7
Therefore, the difference between 39.4 and 1.7 is 37.7.