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Ratio calculations (ratio), Changing the ratio expression type, Ratio mode calculation examples – Casio fx-92B Collège 2D+ User Manual

Page 24

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E-23

To verify 0

8

3

9

8

2

9

( ) ( )

(VERIF)

0

(VERIFY) ()

8

9 C 8 9 C7

To verify 5

2

= 25 = 625

(VERIF)

5

7 (VERIFY) (=)

25

V() 625 U

Ratio Calculations (RATIO)

The RATIO Mode lets you determine the value of X in the ratio expression

a

/

b

= X /

d

(or

a

/

b

=

c

/ X) when the values of

a

,

b

,

c

and

d

are known. The

following shows the general procedure for using RATIO.

1. Press

(RATIO) to enter the RATIO Mode.

2. On the menu that appears, select the

(a/b=X/d) or (a/b=c/X).

3. On the Coefficient Editor screen that appears, input up to 10 digits for each

of the required values (

a

,

b

,

c

,

d

).

• To solve 3 / 8 = X / 12 for X, for example, press

in step 1, and

then input the following for the coefficients (

a

= 3,

b

= 8,

d

= 12):

3

8 12 .

• To change a coefficient value you already have input, move the cursor

to the appropriate cell, input the new value, and then press

.

• Pressing

will clear all of the coefficients to zero.

Note: The following operations are not supported by the Coefficient Editor:
;, ;(M–), B(STO). Pol, Rec, ÷R and multi-statements also
cannot be input with the Coefficient Editor.

4. After all the values are the way you want, press

.

• This displays the solution (value of X). Pressing

again will return to

the Coefficient Editor.

Important: A Math ERROR will occur if you perform a calculation while 0
is input for a coefficient.

Changing the Ratio Expression Type

Re-enter the RATIO Mode and select the ratio expression type you want
from the menu that appears. Changing the ratio expression type causes the
values of all Coefficient Editor coefficients to change to zero.

RATIO Mode Calculation Examples

To calculate X in the ratio 1 / 2 = X / 10

(RATIO)

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