legrandschool1oxa0sd legrandschool1oxa0sd
  • 19-12-2017
  • Mathematics
contestada

Martin had 7 pounds of grapes left, and he gave away 2/5 of them. Explain how to use compatible numbers to estimate the amount of grapes he gave away.

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solaric
solaric solaric
  • 19-12-2017
Answer: 14/35
7-2/5=
7/7 -3/5=
35/35-21/35=
14/35
Answer Link
dvikhan dvikhan
  • 28-06-2018
2/5 is close to 1/2, and it is easy to find 1/2 of 7 mentally. Half of 7 is 3.5, so Martin gave away about 3.5 pounds.
Answer Link

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