Solutions by everydaycalculation.com
440 - 1840 is -720.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/40-18/40 4/40-36/40 4/80-18/40 4/40-18/80 12/40-18/40 4/40-54/40 20/40-18/40 4/40-90/40 28/40-18/40
© everydaycalculation.com