Solutions by everydaycalculation.com
670 + 870 is 15.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/70+8/70 6/70+16/70 18/70+8/70 6/70+24/70 30/70+8/70 6/70+40/70 42/70+8/70 6/70+56/70
© everydaycalculation.com