This command updates number labels by a math operation. After
selecting the text to update, choose to add, subtract, multiply or
divide, and then enter the amount.
Select text entities.
Select objects: pick the number labels
Enter the operator (+ - * /): +
Enter a real number: 100
Enter number of decimals: 1
Pulldown Menu Location: Edit > Text
Keyboard Command:
txtmath
Prerequisite: Text with numbers