Thursday

January 29, 2015

January 29, 2015

Posted by **Sarah** on Wednesday, January 9, 2013 at 1:45am.

Please help me find the pattern and how to use it instead of adding 60+61+62+63..... etc.

- Math -
**MathMate**, Wednesday, January 9, 2013 at 4:59amUse the Gauss method:

60+61+62...+70+71...+80

80+79+78+..+70+69...+60

Add the two lines, you will get the sum 140 21 times. So half the sum is 70*21=1470.

**Answer this Question**

**Related Questions**

Math - The sum of the integers from 40 to 60, inclusive, is 1050. what is the ...

Math - The sum of integrs from 40-60, inclusive, is 1050. What is the aum of the...

Math ( Number Theory ) - How many numbers from 1 to 1000 inclusive can be ...

college math - I do not understand a problem from a text book or how to solve ...

algebra - The sum of the first n counting numbers 1 + 2 + 3 + 4 + 5 ... + n is ...

SAT prep help - Set M consists of the consecutive integers from -15 to y, ...

SAT math - Set M consists of the consecutive integers from -15 to y, inclusive. ...

Math (algebra) - Let x,y be complex numbers satisfying x+y=a xy=b, where a and b...

math - the sum of 3 consecutive integers is the same value as twice the greatest...

math - i dont get this question consecutive integers are integers that differ by...