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Write the successor and the predecessor of −13.

Class 6IntegersIntegers
  • ASuccessor −14, predecessor −12
  • BSuccessor −12, predecessor −14
  • CSuccessor 12, predecessor 14
  • DSuccessor −11, predecessor −15

Step-by-Step Solution

The successor is one step to the right on the number line, so −13 + 1 = −12. The predecessor is one step to the left, so −13 − 1 = −14. The trap is moving the wrong way because the number is negative — stepping right from a negative integer brings you closer to zero, not further from it.
Answer: B) Successor −12, predecessor −14

Key idea: Integers on the number line

Draw a line, mark zero in the middle, and step off equal distances. To the right: 1, 2, 3, …. To the left: −1, −2, −3, …. Every integer has its own spot. The further left, the smaller the integer. The further right, the larger. This single picture is the foundation for everything else in this topic — when in doubt, draw the line.

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