Signed Numbers

Review: Basics of integers

Transcript

1. Combining Integers 1)When you add or subtract: a)If both numbers have a + before them, or if either have no sign before them indicating they are both positive, then add the numbers and keep the answer positive.
2. 12 10 2  
3. 12 10 2     m m
4. 12 10 2     m m
5. Combining Integers 1)When you add or subtract: b) If both of the numbers have a - before them, add the numbers and keep the answer negative.
6. 12 10 2    
7. 12 10 2     m m
8. 12 10 2      m m
9. Combining Integers 1)When you add or subtract: a)If the signs are different, subtract the smaller number from the larger number, keep the sign of the larger number. (find the difference and keep the sign that goes with the bigger numerical value)
10. 8 10 2     m m 8 10 2     m m
11. 8 10 2    8 10 2   
12. 10 10 2      m m 8 10 2     m m
13. Combining Integers 1)When you multiply or divide: a)Same signs = answer is positive 8 4 2 ) 4 ( 2 ) 4 )( 2 ( 8 4 2 ) 4 ( 2 ) 4 )( 2 (              
14. Combining Integers 1)When you multiply or divide: b) Different signs = answer is negative 8 4 2 ) 4 ( 2 ) 4 )( 2 ( 8 4 2 ) 4 ( 2 ) 4 )( 2 (                