well im in this advance math class and i cant figure this problem she asked us to add all the numbers from 1-100 and get the answers and see if there is a pattern/strategy 2 do it easily but i tried adding on the calculator but i dont get an answer my calculator broke 1+2+3+4+5+6+7+8+9+10............,,,and so on so PLZ HHeeLLpp
2007-09-14 11:49:23 · 2 answers · asked by fraankiee! 2 in Education & Reference ➔ Homework Help
i dtill dont get whats the answer??? i tried that 21 stuff it works but im not woorried about 20 im worried about 100.
2007-09-14 12:15:39 · update #1
Let's use the numbers 1 - 20 to illustrate a strategy:
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 +10
20+19+18+17+16+15+14+13+12+11
Did you notice, if you place half of them backwards,
then add up the 10 pairs, they each make 21?
So the total would be 210.
2007-09-14 12:06:57 · answer #1 · answered by Robert S 7 · 3⤊ 0⤋
just put 100! on ur calculator...the factorial sign (!) is like saying 1+2+3+4+5+.....
2007-09-14 19:01:31 · answer #2 · answered by Alfred 2 · 0⤊ 3⤋