AboutAbe Mantell Expertise Hello, I am a college professor of mathematics and regularly teach all levels from elementary mathematics through differential equations, and would be happy to assist anyone with such questions!
Experience Over 15 years teaching at the college level.
Organizations belong to NCTM, NYSMATYC, AMATYC, MAA, NYSUT, AFT.
Education/Credentials B.S. in Mathematics from Rensselaer Polytechnic Institute
M.S. (and A.B.D.) in Applied Mathematics from SUNY @ Stony Brook
Question I am trying to figure how to solve decimals with nothing to borrow from. Ex... 0.0025 - 0.075, 0.9- 76.78, 6.241 - 37.7293. I have seen the answers and used a calculator but, I don't understand how 0.0025- 0.075= 0.075. I saw one website that renamed the first zero with a 7 on several problems. Why would you do that? Please help. How do you subtract decimals with nothing to borrow from?
Answer How did you get 0.0025 - 0.075 = 0.075 ???
It should be -0.0725
When you subtract a larger number from a smaller one, you find the
difference (by switching the order so it is the smaller subtracted
from the larger), but just out a negative sign in front of the answer.
For example, 3-8=-(8-3)=-5...so 0.0025-0.075=-(0.075-0.0025)=-0.0725
