Question

0-1+2-3+4-5+6-7...+16-17+18-19+20​

Answer 1

Answer:

0-1+2-3+4-5+6-7...+16-17+18-19+20= -17

Step-by-step explanation:

0-1 = -1

-1+2=1

1+4=5

5-5=0

0+6= 6

6-7= -1 Now, "..." is not a math.

-1+16= -15

-15-17= -32

-32+18 = -18.

-18-19= -37

-37+20= -17

Answer 2

Answer:

10

Step-by-step explanation:

(0+2+4+6+8+10+12+14+16+18+20)+(-1-3-5-7-9-11-13-15-17-19)=(110)+(-100)

=110-100

=10

Hope it helps

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