Step-by-step explanation:
5. -2/1 × 3/7
= (-2×3)/1×7
=-6/7
6.[((-2×3)+2)/3]×((4×10)+1)/10
=(-6+2)/3 × (41/10)
=(-4/3)×(41/10)
=-4×41/3×10
=-164/30
7. (-2×5+1)/5 × (-1×4+3)/4
=-11/5 × -5/4
=-11×-5/5×4
=55/20
I'm sure by now you've got a hang of it so I'm gonna skip some steps
8.-5/4×9/1
=-5×9/4×1
=-45/4
9.-12/7×-5/2
=-12×-5/7×2
=60/14
10.-19/8×5/2
=-19×5/8×2
=-95/16
