A Lesson on adding and subtracting negative numbers

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This is helpful for reviewing addition and subtraction

 
 
of negative numbers. After viewing the following video,
 
 
 
please solve the problems below.
 
 
 
 
 
 
 
1) -5 + 7 =
 
 
2) -4 - -2 =
 
 
3) 5 - 6 =
 
 
4) 18 - -3 =
 
 
5) - 27 - -7 = 
 
 
Please check your answers below:
 
 
1) 2
 
 
2) -2
 
 
3) -1
 
 
4) 21
 
 
5) -20 
 
 
 
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