81 and 9 if you add them. 4 and 25 if you multiply them.
115
20
Add a 0 onto 100, or add 2 0's onto 10. Multiply by 10 = add a 0 Multiply by 100= add 00 Multiply by 1000 = add 00 Teachers prefere not to say 'add a 0'. This is like a cheat, and does not work for decimals.
Product = multiply.
If you've written that correctly, there aren't two whole numbers that satisfy those conditions. -20 and -5 add to -25, but multiply to 100. -25 and 4 multiply to -100, but add to -21.
-115
Multiply the number by 100 and add a percentage sign.
50
It's unclear whether you want two numbers that add to a sum or multiply to a product. 25 x 4 = 100 25 + 75 = 100
-100
99
120
81 and 9 if you add them. 4 and 25 if you multiply them.
125
221
-148