Martha bought 20 5⁄6 yards of fabric to make curtains. she only used 16 7⁄9 yards of the fabric. how much fabric remained?

What signals you that factoring by grouping is the best method to use when factoring a problem?

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189