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_
--
Practice A
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For use with pages 18-23
_ {m
CA Standards NS 1.2 ' AF 1.3
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• .,
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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
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~~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?
