Solutions by everydaycalculation.com
660 + 4260 is 45.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/60+42/60 6/60+84/60 18/60+42/60 30/60+42/60 42/60+42/60
© everydaycalculation.com