Solutions by everydaycalculation.com
660 + 3560 is 4160.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/60+35/60 6/60+70/60 18/60+35/60 30/60+35/60 42/60+35/60
© everydaycalculation.com