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Practice set c
Determine the value of each of the following.
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Calculators
Using a calculator is helpful for simplifying computations that involve large numbers.
Sample set d
Use a calculator to determine each value.
|
Key |
|
Display Reads |
Perform the multiplication first. |
Type |
56 |
56 |
|
Press |
× |
56 |
|
Type |
85 |
85 |
Now perform the addition. |
Press |
+ |
4760 |
|
Type |
9842 |
9842 |
|
Press |
= |
14602 |
The display now reads 14,602.
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|
Key |
|
Display Reads |
Operate inside the parentheses |
Type |
27 |
27 |
|
Press |
+ |
27 |
|
Type |
18 |
18 |
|
Press |
= |
45 |
Multiply by 42. |
Press |
× |
45 |
|
Type |
42 |
42 |
|
Press |
= |
1890 |
Place this result into memory by pressing the memory key.
|
Key |
|
Display Reads |
Now operate in the other parentheses. |
Type |
810 |
810 |
|
Press |
÷ |
810 |
|
Type |
18 |
18 |
|
Press |
= |
45 |
Now multiply by 105. |
Press |
× |
45 |
|
Type |
105 |
105 |
|
Press |
= |
4725 |
We are now ready to add these two quantities together. |
Press |
+ |
4725 |
Press the memory recall key. |
|
|
1890 |
|
Press |
= |
6615 |
Thus,
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Nonscientific Calculators |
Key |
|
Display Reads |
Type |
16 |
16 |
Press |
× |
16 |
Type |
16 |
16 |
Press |
× |
256 |
Type |
16 |
16 |
Press |
× |
4096 |
Type |
16 |
16 |
Press |
= |
65536 |
Press the memory key |
|
|
Type |
37 |
37 |
Press |
× |
37 |
Type |
37 |
37 |
Press |
× |
1396 |
Type |
37 |
37 |
Press |
× |
50653 |
Press |
+ |
50653 |
Press memory recall key |
|
65536 |
Press |
= |
116189 |
Calculators with
Key |
Key |
|
Display Reads |
Type |
16 |
16 |
Press |
|
16 |
Type |
4 |
4 |
Press |
= |
4096 |
Press |
+ |
4096 |
Type |
37 |
37 |
Press |
|
37 |
Type |
3 |
3 |
Press |
= |
116189 |
Thus,
We can certainly see that the more powerful calculator simplifies computations.
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Nonscientific calculators are unable to handle calculations involving very large numbers.
Key |
|
Display Reads |
Type |
85612 |
85612 |
Press |
× |
85612 |
Type |
21065 |
21065 |
Press |
= |
|
This number is too big for the display of some calculators and we'll probably get some kind of error message. On some scientific calculators such large numbers are coped with by placing them in a form called "scientific notation." Others can do the multiplication directly. (1803416780)
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Practice set d
Use a calculator to find each value.
This number is too big for a nonscientific calculator. A scientific calculator will probably give you
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Exercises
For the following problems, find each value. Check each result with a calculator.
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Exercises for review