Solutions by everydaycalculation.com
1221 + 421 is 1621.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+4/21 12/21+8/21 12/42+4/21 12/21+4/42 36/21+4/21 12/21+12/21 12/63+4/21 12/21+4/63 60/21+4/21 12/21+20/21 84/21+4/21 12/21+28/21
© everydaycalculation.com