What is another way to write 42 + 63

There are many ways to write this :)

21+21+31.5+31.5 Here we split both of the numbers in half, creating a different way of writing the equations!

or alternatively a more basic form would be:

63+42 All we did here was switch the numbers to create the same equation in the opposite form!

I hope this helped. Have a great day!

The third question is correct.