CHAPTER 1
Let’s Get Started
4
MODE
2
7
6
9
=
MODE
MODE
MODE
2
5
x
-1
X
•
3
5
X
•
2
9
1
4
+
5
)
6
=
x
-1
(
x
-1
x
-1
–
x
-1
SHIFT
STO
RCL
A
(–)
Find the area of the right-angle triangle given below, expressing your
answer correct to 5 significant figures.
OPERATION
1
. After entering
COMP
mode, evaluate the area by using the formula
height
base
×
×
2
1
.
2
. Now to express answer correct to 5 significant figures, choose 5 to specify the number of
significant figures.
Note that this is not the final answer. Since the power of the 10 after 3.4169 is 1, we move
the decimal point one place to the right to obtain the required answer, i.e. 34.169cm.
Calculate
6
1
5
1
1
4
1
−
+
and store this value into variable
A
..
OPERATION
1
. While in
COMP
mode, press
2
. To store the value into
A
, simply press
Try to think of other ways to key in the expression in Example 8.
Example 7
D
0
2
-1
X 7.356 X 9.29
34.16862
7.356cm
9.29cm
2
-1
X 7.356 X 9.29
3.4169
fi
10
01
4
-1
+(5
-1
-6
-1
)
-1
30.25
4
-1
+(5
-1
-6
-1
)
-1
„
A
30.25
Example 8
