Solutions by everydaycalculation.com
990 + 6390 is 45.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90+63/90 27/90+63/90 45/90+63/90 63/90+63/90
© everydaycalculation.com