Basic Operations Practice Questions

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For questions 1-10, simplify the given expression.

1. 5.68 + 3.4 + 19.21 + 4

A. 22.29
B. 31.29
C. 31.49
D. 32.29
E. 32.49

2.  (26.1 + 3.9) . 5.4 . 0 . (12.45 - 8.1)

A. 0
B. 50.49          
C. 162
D. 280.5
E. 704.7

3.  -4 + (-13) + 10

A. -27
B. -7
C. -1
D. 1
E. 19

4.  23 - (-38)

A. -61
B. -15
C. 13
D. 15
E. 61

5.  (20 5) + (12 4)

A. 4
B. 5
C. 6
D. 7
E. 8

6.   215 + 56 + 4 + 490

A. 656
B. 655
C. 755
D. 756
E. 765

7.  780 (-26)

A. -30
B. -20
C. 18
D. 20
E. 30

8.  (4 + 7) . (9 - 3)

A. -132
B. -66
C. 66
D. 96
E. 132

9.  3 . (-5) . 8 . 2

A. -240
B. -120
C. -80
D. 80
E. 120

10.  6.791 - 4.81

A. 1.911
B. 1.981
C. 2.181
D. 2.171
E. 2.709

Answer Key

1. D. The easiest way to add the four numbers is to set up the addition vertically. Rewrite each number so that they all have the same number of digits after the decimal. Then add vertically.

                5.68
                3.40
              19.21
            +  4.00
              32.29

2. A. The easiest way to simplify this expression is to realize that one of the quantities is zero. Since the product of zero and any other number is zero, the correct answer is 0.

3. B. Add the numbers from left-to-right.      -4 + (-13) + 10

-17 + 10

-7

4. E. Subtracting a negative number is the same as adding its absolute value (the positive version). Change the subtraction to addition, and then add normally.

5. D. Use the order of operations to calculate. First calculate the expressions in parentheses. Then simplify the result.

6. E. The easiest way to add the four numbers is to set up the addition vertically. Be sure to line up the digits correctly starting with the ones place on the right.

               215
                  56
                    4
            + 490
                765

7. A. The quotient of a positive number and a negative number is a negative number.

780 (-26) = -30

8. C. Use the order of operations to calculate. First calculate the expressions in parentheses. Then simplify the result.

9. A. Multiply the numbers from left to right. The product of a positive number and a negative number is negative.

            3 x (-5) x 8 x 2 = -15 x 8 x 2
                                          = -120 x 2
                                          = -240

10. B. The easiest way to subtract the numbers is to set up the subtraction vertically. Rewrite each number so that they all have the same number of digits after the decimal. Then subtract vertically.

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Last Updated: 04/17/2014

 

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