Solutions by everydaycalculation.com
1621 + 1821 is 3421.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+18/21 16/21+36/21 16/42+18/21 16/21+18/42 48/21+18/21 16/21+54/21 16/63+18/21 16/21+18/63 80/21+18/21 16/21+90/21
© everydaycalculation.com