Question

1-2+3-4+5-6+7-8+9-10+11-12+13-14+15-16+17-18+19-20
solution for this

Answer 1

1-2+3-4+5-6+7-8+9-10+11-12+13-14+15-16+17-18+19-20

= (-1)+(-1)+(-1)...10 times

= -10

HOPE THIS COULD HELP!!!

Answer 2

Answer:-10

Step-by-step explanation:Each two terms form a pair whose result is -1, (1-2,3-4,5-6,7-8, etc.)

Number of pairs =20 /2 (as each pair has two numbers)=10

Therefore the result of all the terms = -1*10= -10

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