Solutions by everydaycalculation.com
820 - 1820 is -12.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-18/20 8/20-36/20 8/40-18/20 8/20-18/40 24/20-18/20 8/20-54/20 8/60-18/20 8/20-18/60 40/20-18/20 8/20-90/20 56/20-18/20
© everydaycalculation.com