Basic Calculation; Mixed Arithmetic Calculation; Parentheses Calculations; Constant Calculation - Datexx DS-834 User Manual

Before performing the following calculation, check to see that
your calculator is in decimal base and floating point display.

Mixed arithmetic calculation

1 + 2 x 3 = ?
– 3.5 + 8 ÷ 2 = ?

Parentheses calculations

Operation inside parentheses are always executed first. You can
use up to 15 levels of parentheses in a single calculation. When the
first parenthesis is opened, the " ( ) " indicator appears and remains
in the display until the last parenthesis is closed.
( 5 – 2 x 1.5 ) x 3
+ 0.8 x ( – 4 ) = ?
2 x { 7 + 6 x ( 5 + 4 ) } 2 [ x ] [ ( ] 7 [ + ] 6 [ x ]
= ?
(Note) : It is unnecessary to press the [ ) ] key before the [ = ] key.

Constant calculation

The calculator enables you to repeat the last number entered or
the last operation executed by pressing [ = ] key.
Repeating the last number
3 x 3 = ?
3 x 3 x 3 = ?
3 x 3 x 3 x 3 = ?
Repeating the arithmetic operation
321 + 357 = ?
654 + 357 = ?
579 - 159 = ?
456 - 159 = ?
18 x 45 = ?
18 x 23 = ?
18 x (0.5 x 10

Basic calculation

1 [ + ] 2 [ x ] 3 [ = ]
3.5 [ +/– ] [ + ] 8 [ ÷ ] 2 [ = ]
[ ( ] 5 [ – ] 2 [ x ] 1.5 [ ) ] [ x ]
3 [ + ] 0.8 [ x ] 4 [ +/– ] [ = ]
[ ( ] 5 [ + ] 4 [ = ]
3 [ x ] [ = ]
[ = ]
[ = ]
321 [ + ] 357 [ = ]
654 [ = ]
579 [ - ] 159 [ = ]
456 [ = ]
3 [ x ] 6 [ x ] 45 [ = ]
23 [ = ]
2
) = ? 0.5 [ EXP ] 2 [ = ]
E - 8
DEG
7.
DEG
0.5
DEG
2.8
DEG
122.
DEG
9.
DEG
27.
DEG
81.
DEG
678.
DEG
1011.
DEG
420.
DEG
297.
DEG
810.
DEG
414.
DEG
900.