Solutions by everydaycalculation.com
12 + 13 is 56.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2+2/3 1/4+1/3 1/2+1/6 3/2+1/3 1/6+1/3 1/2+1/9 5/2+1/3 1/2+5/3 1/10+1/3 1/2+1/15 7/2+1/3 1/2+7/3 1/14+1/3 1/2+1/21
© everydaycalculation.com