Question

1. 20 ÷ [1- = (-1)]
2. (-1) x 2 x (-1) x (-27)
3. 1698 x 97 - (-3) x 1698
4. (-25) x (-68) x 4 x 2
5. a) _______ + ___________ = -9
b) ________ - ___________ = -32
c) _________ x __________ = -88
6. using property find the value of the greatest 4 digit number and the greastest 2
digit number
7. verify a÷ (b+c) ≠ (a÷b) ÷c if a = -64 , b=8, c =-2
9. -30 -(-5) -7 or (-30) + 5 - (-7)

Answer 1

2) in attached image!!
hope it will help ..
and in question 1st,check whether the (-) sign is before or after 1?