Solutions by everydaycalculation.com
2140 + 2040 is 4140.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40+20/40 21/80+20/40 21/40+20/80 63/40+20/40 21/40+60/40
© everydaycalculation.com