Solutions by everydaycalculation.com
830 - 2030 is -25.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/30-20/30 8/30-40/30 8/60-20/30 8/30-20/60 24/30-20/30 8/30-60/30 8/90-20/30 8/30-20/90 40/30-20/30 56/30-20/30
© everydaycalculation.com