Solutions by everydaycalculation.com
660 + 4060 is 2330.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/60+40/60 6/60+80/60 18/60+40/60 30/60+40/60 42/60+40/60
© everydaycalculation.com