Sharp EL-531LH - Review Calculator Exercises

Mastering the Calculator using the Sharp EL-531LH 37
Review calculator exercises
1. Perform the following calculations
(i) (5 + 4) × 3
(ii) 12.5 – 8 ÷ 0.5
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
(ix)
(x)
(xi)
2. The following data is on growth (in $m) in an economy over a 8 year period:
2.5 6.2 -2.1 0.04 8.2 7.4 2.1 -1.7
Calculate (i) Σx (ii) Σx
2
(iii) (Σx)
2
Explain in words what each of these mean.
368–
×
4
-
----------------
----
12.8
1
6.5 3
.8
–
-
-------------------
----
70.4117+
×
47+()2×
-
---------------------------
----
2.4
3
4
-
--
-
--
----
145.6 17.2
2
5
⁄–
345.6 17.2
2
–
5
⁄
2
5
327
×
1.02 3
0
-----------------
----
+
4.1333 3.000–()2.015
0.1366
2
6
-------------------
0.2000
2
6
---------------
----
+±
100 90–()
2
90
-
---------------------------
50 60–()
2
60
-------------------------
20 30–()
2
30
---------------------
----
++