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What addition problem does the number line show? What is the sum? 11. I -6. --~ ... or how much will she still need? 26. California Math, Course 2. Chapter 1.

Date

Name_

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Practice A

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For use with pages 18-23

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CA Standards NS 1.2 ' AF 1.3

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1. What addition problem does the number line show? What is the sum? 11

I

--I

-6

--~

.. +H--I

-7 -6 ·--5 -4 --3 --2

+

0

]

1

t-+-+-+-+-+-2

3

4

5

6

7

Use a number line to find the sum. 2.

-2

+4

3.7+(-8)

4. --6

+ (--3)

Complete the rule for adding integers without using a number line. 5. If the integers have the same sign, then add the common sign. 6. If the integers have different signs, then __ . value from the greater absolute value. Use the with the greater absolute value.

.

and use the

._ the lesser absolute . of the number

In Exercises 7-1.5, find the sum. 7. --23

+

8. -47 + 0

31

10. -49 + (-121) 13. -83

9. -38

11.--15 +15 + (-23)

+ 41 + 63

14. ·-27

+ 56 +

(-85)

+ (-54)

12. -12 + 37 + (-54) :1.5. --48

+ (-39) + 21

.' ;>.

~~l I 16.

17.

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On Friday, the low temperature was 12 degrees below zero. On Saturday, the low temperature was 6 degrees warmer. Write an expression to find Saturday's low temperature. A fisherman has a baited hook 5 feet below the surface of the water. He does not catch any fish, so he lowers the hook 8 feet. He catches no fish there, so he raises the level of the hook 4 feet. How deep is the hook at this point?