1. Calculate the value of (-3)-5-(3-5) as (a) a) a.-6 b.- 10 c.-4 d.0/0 c.-4 d.0.

2. If (minus half) +9-()+ six and a half 1-9 = 10, the number in brackets should be (d) a.3b.-3c.4d.-4.

3. The sum of minus two and one third and minus one and one half is (minus three and five sixths).

4. The number 19 smaller than the reciprocal of 19 is (-38).