What is 2 and 3 tenths plus 4 tenths?

Oh, what a lovely question! When you add 2 and 3 tenths to 4 tenths, you simply combine the whole numbers and then add the tenths separately. So, 2 and 3 tenths plus 4 tenths equals 2 and 7 tenths. It's like adding a few happy little drops of paint to create a beautiful new color on your canvas.