How do you find the answer to 3.4 - 0.972

3 answers

Add three zeroes at the end of 3.4 and subtract.

3.400 - 0.972

I'll be glad to check your answer.
you subtract:

3.400
-0.972
-------
2.428

check:

0.972
+2.428
------
3.400
Help I dont get how you got 2.428