Solutions by everydaycalculation.com
3645 - 4045 is -445.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45-40/45 36/45-80/45 36/90-40/45 36/45-40/90
© everydaycalculation.com