Solutions by everydaycalculation.com
645 + 1545 is 715.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/45+15/45 6/45+30/45 6/90+15/45 6/45+15/90 18/45+15/45 30/45+15/45 6/45+75/45 42/45+15/45
© everydaycalculation.com