Adding
Use a model
(+6) + (-9)
What is -3?
(-8) - (+5)
What is -13?
Can adding two integers ever result in zero? Give examples and explain why.
Which integer is 6 greater than -5?
What is +1
Use a model to Add.
(-6) + ( -4)
What is -10?
(-10) - (-6)
What is -4?
Why is −3 greater than −8, even though 8 is larger than 3?
Which integer is neither positive or negative?
What is Zero?
Box + (-3) = +4
What is +7?
(+4) + (-8) + (+6)
What is +2?
On April 27th, 2004, the highest temperature in Windsor was +5 C and the highest temperature in Yellowknife was -2 C. What is the difference in temperature.
What is (+5) - (-2)= +7 The temperature in Windsor is 7 degrees c greater than the temperature in Yellowknife or (-2) - (+5) = -7 The temperature in Yellowknife is 7 less than the temperature in Windsor.
What is the most important question you need to ask yourself when subtracting integers?
What is "Do I have that amount to subtract"?
What is -10?
(+23) + (+87) + (-23) + (+5)
What is +92
Copy the triangle at the left. Place the numbers -6, -5, -4, -3, -2, -1 in the triangle so the sums of the sides are the same.
What is see the board?
What is a Zero Pair?
See board
(+90) + (-200) + (+110) + (-6)
What is -6?
When you add two positive integers, their sum is always a positive integer. When you subtract two positive integers, is their difference always a positive integer? Explain.
NO
(+5) - (+2) = +3
(+2) - (+5) = -3
Represent +5 in three different ways
See board
An elevator started in the basement, rose 11 floors, descended 7 floors, descended 3 floors, rose 8 floors, rose 3 floors, and descended 7 floors. At what floor did the elevator stop? Assume the basement to be floor 0.
What is +5?
Find 3 pairs of integers with a sum of -6
(-3) + (-3)
(-7) + (+1)
etc