Problem
To which subsets of the real numbers does the number -0.42 belong? Check all that apply irrational rational integer whole natural
Solution
Step 1 ：To which subsets of the real numbers does the number -0.42 belong? Check all that apply: irrational, rational, integer, whole, natural.
Step 2 ：The number -0.42 belongs to the subset of rational numbers.
Step 3 ：Final Answer: The number -0.42 belongs to the subset of \(\boxed{\text{rational numbers}}\).
