Question

integers
Q1) calculate:
1-2+3-4+5-6+7-8+9-10​

Answer 1

Answer:

-5 is right answer

Step-by-step explanation:

1+3+5+7+9-(2+4+6+8+10)

25-30= -5

Answer 2

Answer:

we can write

1+3+5+7+9=25

-2-4-6-8-10= -30

25-30=-5