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Integers
- 8. Negative Numbers Are Used to Measure Temperature
- 9. Negative Numbers Are Used to Measure Under Sea Level 0 10 20 30 -10 -20 -30 -40 -50
- 10. Negative Numbers Are Used to Show Debt Let’s say your parents bought a car but had to get a loan from the bank for $5,000. When counting all their money they add in -$5.000 to show they still owe the bank.
- 16. One Way to Add Integers Is With a Number Line When the number is positive, count to the right. When the number is negative, count to the left. + - 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 17. One Way to Add Integers Is With a Number Line + - +3 + -5 = -2 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 18. One Way to Add Integers Is With a Number Line + - +6 + -4 = +2 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 19. One Way to Add Integers Is With a Number Line + - +3 + -7 = -4 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 20. One Way to Add Integers Is With a Number Line - + -3 + +7 = +4 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 21. Integer Subtraction Rule Subtracting a negative number is the same as adding a positive. Change the signs and add. 2 – (-7) is the same as 2 + (+7) 2 + 7 = 9!
- 22. Here are some more examples. 12 – (-8) 12 + (+8) 12 + 8 = 20 -3 – (-11) -3 + (+11) -3 + 11 = 8
- 23. You have learned lots of things About adding and subtracting Integers. Let’s review!
- 26. One Way to Add Integers Is With a Number Line When the number is positive, count to the right. When the number is negative, count to the left. + - 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 27. Integer Subtraction Rule Subtracting a negative number is the same as adding a positive. Change the signs and add. 2 – (-7) is the same as 2 + (+7) 2 + 7 = 9!