Question

-1+2-3+4-5+...+98-99+100

Answer 1

А что надо сделать???
типо потом +5-6+7-9
да?

Answer 2

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46.....+98+99+100

Answer 3

To find the sum of the given series, we can observe that it consists of alternating positive and negative numbers. The series starts with -1 and continues with increasing positive integers until 100.

If we group the numbers together, we can see that each pair of consecutive numbers sums up to 1. For example, -1 + 2 = 1, -3 + 4 = 1, -5 + 6 = 1, and so on.

Since there are 50 pairs in total (from -1 to -99), the sum of these pairs would be 50 * 1 = 50.

However, we also need to consider the last term, which is 100. Since it does not have a pair to cancel it out, we simply add it to the previous sum.

Therefore, the sum of the series -1+2-3+4-5+...+98-99+100 is 50 + 100 = 150.