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STANDARD FORM AND DECIMAL PLACES     20041115

This exercise is aimed to test your ability to switch between the forms of answers on your calculator by using mode or FSE depending on your calculator type, and particularly without re-doing the calculation. It also persuades you not to start every move by clearing the display. You should write how to do this on YOUR calculator in YOUR book.

Give two ‘answers’ to each of these calculations
                                 a)  3 significant figures in Standard Form  AND  b)  to 5 decimal places

Example:        

.                      7.1x 10³                              =   2.63x10^-2                   =   0.02630
                2.7x10⁵  

1.        7.12x 10³  
           2.77x10⁵

2.       6.49x 10¹³   
           2.6x10¹⁵

3.       36 500  
         276 358

4.      0.715 x 0.064² 

5.      7.15x 10 ^-1     x 4.096x10 ^-3


6.      7.15x 10⁹     x 4.1x10 ^-13

7.      2.3x 10¹³   x 4.7x 10 ^-4       
                 7.7x10 ¹²

8.       3.2 x 10 ²⁶   x 2.03 x 10 ^-39

9.     2.05 x 10¹⁹ 
        7.69 x 10²¹

10.     2.1x 10 ⁷ x    3.2 x 10 ^-4      
                1.024x10³

11.   0.021² x  6 

12.       2.1 ⁷  x 3.2 ^–4

Be careful to read what is wrtitten.
Write on the sheet only if you can be neat enough to make it fit…….

1       2.57x10 ^-2     0.02570                           7       1.40x10 ^-3       0.001 40       
2       2.50x10 ^-2     0.02496                          8        6.50x10 ^-13     0.000 00    
3       1.32x10 ^-1     0.13208                          9        2.67x10 ^-3       0.002 67       
4       2.93x10 ^-3     0.00293                        10        6.56.x10 ⁰       6.562 50       
5       2.93.x10 ^-3    0.00293                        11        2.65x10 ^-3       0.002 65 
6       2.93x10 ^-2     0.00293                        12        1.72.x10 ²       1.71765