Answer:
b)−1×2×−3×4×−5 has a negative value.
Step-by-step explanation:
Given expressions are a)−1×−2 b)−1×2×−3×4×−5 C) 1×−2×−3×−4×−5 d)1×−2×3×−4×5
Firstly we have to multiply the digits with digit then after minus sign.
So for a)−1×−2
Solution, [tex]1\times2\ =2[/tex]
When two negative signs are multiplied with each other it gives a positive sign.
Both digits have a negative sign that means it gives a positive sign.
So the solution for 1st expression is [tex]2.[/tex]
b)−1×2×−3×4×−5
Solution,[tex]1\times2\times3\times4\times5\ =120[/tex]
Here three digits have negative sign, two negative gives positive and then multiplied by negative gives negative.
So the solution for 2nd expression is [tex]-120[/tex].
C) 1×−2×−3×−4×−5
Solution,[tex]1\times2\times3\times4\times5\ =120[/tex]
Here four digits have negative sign, two negative gives positive and again two negative gives positive means positive multiplied with positive gives positive.
So the solution for 3rd expression is [tex]120[/tex].
d)1×−2×3×−4×5
Solution,[tex]1\times2\times3\times4\times5\ =120[/tex]
Two digits have a negative sign that means it gives a positive sign.
So the solution for 4th expression is [tex]120[/tex].
Hence the correct option is b.
