Basic Math Examples

$656 - 521$

Step 1

Round

$656$ to

$650$ .

$650 - 521$

Step 2

Round

$- 521$ to

$- 500$ .

$650 - 500$

Step 3

Subtract

$500$ from

$650$ .

$150$

Step 4

The approximate value of

$656 - 521$ found by front end estimation.

$656 - 521 \approx 150$

$656 - 521$

(

(

)

)

|

|

[

[

]

]

√

√





≥

≥













π

π





7

7

8

8

9

9













≤

≤





















4

4

5

5

6

6

/

/

^

^

×

×

>

>













!

!





1

1

2

2

3

3

-

-

+

+

÷

÷

<

<



















,

,

0

0

.

.

%

%



=

=









$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$