42
Mastering the Calculator using the Casio fx-82MS
Calculator solutions
1.
(i)
(5 + 4)
×
3
= 27
Make sure your calculation is in comp mode.
(ii) 12.5 – 8
÷
0.5
= -3.5
(iii)
= 2.5
Either (3
×
6 – 8)
÷
4 = or 3
×
6 – 8 =
÷
4 =
(iv)
= 1.007874
Either 12.8
÷
(16.5 – 3.8) = or 16.5 – 3.8 = x
–1
×
12.8 =
(v)
= 0.9
Either ...
÷
((4 + 7)
×
2) = or ...
÷
(4 + 7)
÷
2 =
(vi)
= 3.2
Either 2.4
÷
(3
÷
4) =, or 2.4
÷
3 a
b/c
4 =
(vii)
= 9.296..
Either 145.6 – 17.2x
2
÷
5 =
√ =,
or
√
(145.6 – 17.2x
2
÷
5)
=
(viii)
= 1.41..
Either 345.6 – 17.2x
2
=
√
÷
5 = or (345.6 – 17.2x
2
)
√
÷
5 =
(ix)
= 39.4985
25 + 3
×
27
÷
1.02
÷
√
30 =
(x)
= 1.3325 or 0.9341
3
6
8
–
×
4
---------------------
12.8
16.5
3.8
–
------------------------
7
0.4
17
+
×
4
7
+
(
)
2
×
-----------------------------
2.4
3
4
---
-------
145.6
17.2
2
5
⁄
–
345.6
17.2
2
–
5
⁄
25
3
27
×
1.02 30
---------------------
+
4.1333
3.000
–
(
)
2.015
0.1366
2
6
-------------------
0.2000
2
6
-------------------
+
±
