Basic Mathematics for College Students

9. When all the sides of a rectangle are the same length,
   we call the rectangle a.


10. The distance around a rectangle is called its
    .

CONCEPTS

11. Which property of addition is shown?

a.

b.

c.

d.

12. a. Use the commutative property of addition to
    complete the following:

b. Use the associative property of addition to

complete the following:

13. Fill in the blank: Any number added to stays the
    same.


14. Fill in the blanks. Use estimation by front-end
    rounding to determine if the sum shown below
    (14,825) seems reasonable.

The sum does not seem reasonable.

Fill in the blanks.

15. The addition symbol + is read as “ .”


16. The symbols ( ) are called. It is standard
    practice to perform the operations within them.

Write each of the following addition fact in words.

17. 
    

18. 
    

Complete each solution to find the sum.

19. 
    

20. 
    



12 (152) 12 



(3611) 5   5

28  22  50

33  12  45

NOTATION

1 4 , 8 2 5 

 8 , 5 4 6 

4 0 2 

5 , 8 7 7 

3 (9716)

19  33 

319  507  507  319

(3658) 32  36 (5832)

(34) 5  3 (45)

3  4  4  3

Add.See Example 1.

21.

22.

23.

24.

25. 21  31  24

26. 33  43  12

27. 603  152  121

28. 462  115  220

Add.See Example 2.

29. 19  16


30. 27  18


31. 45  47


32. 37  26


33. 52  18


34. 59  31

35.

36.

Add.See Example 3.

37.

38.

39. 4,301  789 3,847


40. 5,576  649 1,922


41. 9,758  586 7,799


42. 9,339  471 6,883


43. 
    


44. 2 9 0
    8 5 9
    3 4 5
     2 2 6

3 4 6

2 1 7

5 6 8

 6 7 9

647  138

156  305

3 5

 4 9

2 8

 4 7

2 1 3

 7 5 1

4 0 6

 2 8 3

47  12

25  13

GUIDED PRACTICE

1.2 Adding Whole Numbers 25