Estimate a range for each sum 3.89 plus 42.71 plus 12.32?

To estimate the sum of 3.89, 42.71, and 12.32, we can round each number to the nearest whole number. This gives us 4, 43, and 12. Adding these rounded numbers gives us an estimated sum of 59. However, it's important to note that this is just an estimation and the actual sum will be slightly higher than this.