How to additions fast. For example we have to do a simple addition like 234 + 563+ 985 + 349.	Choose the correct choice from the following answers:
A) 2131	B) 7399	C) 2997	D) 2769	E) 2771
Instead of doing like this we first add all the digits in the hundred's place. 2 + 5 + 9 + 3 = 19. Put 2 zero's to the right hand side so we get 1900.   Now add the digits in the tenth's place. 3 + 6 + 8 + 4 = 21. Put 1 zero to the right hand side so we get 210.   Now add the digits in the units place   4 + 3 + 5 + 9= 
<gadget id="calculator">  4 + 3 + 5 + 9</gadget>
<output>21</output>
21.   Now  1900 + 210 + 21= 
<gadget id="calculator"> 1900 + 210 + 21</gadget>
<output>2_131</output>
2131   2131nswer:2131
<result>A</result>
How to additions fast. For example we have to do a simple addition like 234 + 563+ 985 + 349.