exploring integers. learning goals understand that: integers are numbers that can be created from...
TRANSCRIPT
Exploring Integers
Learning Goals
Understand that:• Integers are numbers that can be created from
subtraction patterns.• Integers appear in many areas of the real
world.
• Temperature is measured in degrees Celsius (˚C). Water freezes at 0˚C.
• On a typical summer day in Saskatoon, the temperature might be 24 ˚C above zero.
• A temperature greater than 0 ˚C is positive. We write 24 ˚C. We say: twenty-four degrees Celsius.
• On a typical winter day in Saskatoon, the temperature might be 18 degrees Celsius below zero.
• A temperature less than 0 ˚C is negative. We write: -18 ˚C. We say: minus eighteen degrees Celsius
Explore
Altitude is the vertical distance above sea level. It is usually measured in meters. For every 150m above sea level, the temperature decreases about 1 ˚C.
Kayla and Sydney are mountain climbing. They begin climbing at an altitude of 1000m. The temperature is 6 ˚C. The table shows the altitude changes.
Altitude (m) Temperature (˚C)
1000 6
1300
1600
1900
2200
2500
Continue the table for altitudes. Write a pattern rule for the temperatures.
• Numbers such as 24 and -18 are integers.
• You can represent integers on a number line. The number line may be vertical or horizontal.
• A thermometer is a vertical number line.
• You have horizontal number lines to compare and order whole numbers. We extend the number line to the left of 0 to show negative numbers.
• We use integers to represent quantities that have both size and direction.
• Mark spent $25. This can be represented as -$25.
• Jean walked 5 steps forward. This can be represented as +5 steps or 5 steps.
• A scuba diver swam to a depth of 50 m. This can be represented as -50m.
• If no sign is written, the integer is positive.
Homework
Grade 5 – P22 – Questions 1-4
Grade 6 – P22 – Questions 1-4 & P26 Questions 1-2