Maths/Computing - Winter Reasoning
30.11.16 Maths/Computing - Winter Reasoning
This is Ms. James, our school Caretaker.
What is she doing? Why?
Rock Salt Rock salt melts ice by lowering the freezing point of the water. As the salt dissolves into the ice, it forms a solution with a much lower freezing point than pure water has. This causes the ice to melt unless the temperatures are about 15 F or lower, when the salt has little effect.
Where in the school grounds does she have to put rock salt down?
Would this view make it easier to calculate?...
Task: Using Digimaps, can you find the area of all of the paths and yards on the school premises? Choose one section of the school at a time and use the ‘Area tool’ to identify the size of space that would need to be rock salted. Once you are happy, use the ‘Snipping Tool’ to capture the image and paste it into a Google Slide - labelling it appropriately.
Your Digimaps: Entrance to Year 6
Sophie’s work - shall we round it to the nearest square metre?
Your Digimaps: Path alongside the infant yard
Mickey’s work - shall we round it to the nearest ten m2?
Your Digimaps: The junior yard
Aimee’s work - shall we round it to the nearest hundred m2?
Your Digimaps: The path outside Year 6 and Year 3
Aidan and Lauren’s work - what shall we round it to?
Your Digimaps:
The infant yard
Eddy’s work - what shall we round it to?
Your Digimaps: The annex path
Joseph and Lauren’s work - what shall we round it to?
Problem 1 Rock Salt comes in 2.5kg bags. It takes 1kg of rock salt to cover a 120m2 area of yard or path. How many bags of salt does Ms James need each day to melt the ice on both yards? Rounded areas: Infant yard: 580m2 Junior yard: 1100m2
Problem 2 Rock Salt comes in 2.5kg bags. It takes 1kg of rock salt to cover a 120m2 area of yard or path. How many bags of salt does Ms James need each day to melt the ice on all of the paths and yards? Use the measurements in the maps to calculate.
Problem 3 Looking at the weather forecast, it predicts 17 days will be icy this term. School has ordered 100 bags of rock salt. Will that be enough? Explain how you are sure.
This is Ms. James, our school Caretaker.
What is she doing? Why?
Rock Salt Rock salt melts ice by lowering the freezing point of the water. As the salt dissolves into the ice, it forms a solution with a much lower freezing point than pure water has. This causes the ice to melt unless the temperatures are about 15 F or lower, when the salt has little effect.
Where in the school grounds does she have to put rock salt down?
Would this view make it easier to calculate?...
Task: Using Digimaps, can you find the area of all of the paths and yards on the school premises? Choose one section of the school at a time and use the ‘Area tool’ to identify the size of space that would need to be rock salted. Once you are happy, use the ‘Snipping Tool’ to capture the image and paste it into a Google Slide - labelling it appropriately.
Your Digimaps: Entrance to Year 6
Sophie’s work - shall we round it to the nearest square metre?
Your Digimaps: Path alongside the infant yard
Mickey’s work - shall we round it to the nearest ten m2?
Your Digimaps: The junior yard
Aimee’s work - shall we round it to the nearest hundred m2?
Your Digimaps: The path outside Year 6 and Year 3
Aidan and Lauren’s work - what shall we round it to?
Your Digimaps:
The infant yard
Eddy’s work - what shall we round it to?
Your Digimaps: The annex path
Joseph and Lauren’s work - what shall we round it to?
Problem 1 Rock Salt comes in 2.5kg bags. It takes 1kg of rock salt to cover a 120m2 area of yard or path. How many bags of salt does Ms James need each day to melt the ice on both yards? Rounded areas: Infant yard: 580m2 Junior yard: 1100m2
Problem 2 Rock Salt comes in 2.5kg bags. It takes 1kg of rock salt to cover a 120m2 area of yard or path. How many bags of salt does Ms James need each day to melt the ice on all of the paths and yards? Use the measurements in the maps to calculate.
Problem 3 Looking at the weather forecast, it predicts 17 days will be icy this term. School has ordered 100 bags of rock salt. Will that be enough? Explain how you are sure.
