Type a nonbreaking dash (Ctrl+Shift+hyphen) instead of a regular dash
before the number.

Ruth Levinson wrote:

When I type a line with a negative number like -4.00 at the end, Word will
break off the minus sign and leave it at the end of the line, and put the
4.00 on the next line. I can't figure how to keep Word from automatically
splitting the minus sign from the number. If I catch it, I have to go in and
add spaces in the line to put the minus sign back with the number at the
beginning of the next line.

Any suggestions?

TIA