Solutions by everydaycalculation.com
1521 + 321 is 67.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+3/21 15/21+6/21 15/42+3/21 15/21+3/42 45/21+3/21 15/21+9/21 15/63+3/21 15/21+3/63 75/21+3/21 15/21+15/21
© everydaycalculation.com