Sharp EL-531LH Mastering Instructions page 42

( )
(x) 4.1333 3.000 –
Calculator keys: 2.015 ×
Display reads 1.3325
then press
Display reads 0.9341
2
( ) (
100 90 – 50 60
--------------------------- - ------------------------ -
(xi) +
90
Calculator keys:
2. The following data is on growth (in $m) in an economy over a 8 year period:
2.5 6.2 -2.1
Calculate (i) Σx (ii) Σx
To do this on the calculator, you must be in SD mode. Enter the data:
2.5 M+ 6.2 M+ 2.1
Display reads n = 8
(i) 22.64
(ii) 178.4016
(iii) 512.5696
2
0.1366 0.2000
±
------------------ - ------------------ -
2.015 +
6
√
÷ 6 + 0.2x
2
(0.1366x
2 2
) ( )
– 20 30 –
------------------------ -
+
60 30
÷ 90 + (50 – 60) x
2
(100 – 90) x
0.04 8.2 7.4
2 2
(iii) (Σx)
+/−
M+ 0.04 M+ 8.2 M+ 7.4 M+ 2.1 M+ 1.7
Press the key that says Σx (
This gives the total growth over the last 8 years
Press the key that says Σx
the squares of the growth in each year
Press Σx and x
2
. This gives the square of the sum of the growth.
Press
Mastering the Calculator using the Sharp EL-531LH
2
6
÷ 6) =
2
+ 4.1333 – 3 =
+ 4.1333 – 3 =
= 6.1111
÷ 60 + (20 – 30) x
2
2.1 -1.7
Explain in words what each of these mean.
)
2
(
= 1.3325 or 0.9341
÷ 30 =
2
+/−
M+
) This gives the sum of
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