Solutions by everydaycalculation.com
1640 + 1840 is 1720.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/40+18/40 16/40+36/40 16/80+18/40 16/40+18/80 48/40+18/40 16/40+54/40 80/40+18/40 16/40+90/40
© everydaycalculation.com