Question

Check if the satements are true
a) 17×[7+(-3)]=17×7+17×(-3)
b)(-25)×[(-5)+17]=(-25)×(-5)+(-25)×17
c)(-19)×[(-17)+(-8)+(-9)=(-19)×(-7)+(-19)×(-8)+(-19)×(-9)
d)12×(-12)+18×(-12)=6×(-12)[2+3]

Answer 1

Answer:

1. 17×[7+(-3)]=17×7+17×(-3)

 68=68

yes it's true

2. (-25)×[(-5)+17]=(-25)×(-5)+(-25)×17

-300 = -300

yes it's true

3. (-19)×[(-17)+(-8)+(-9)=(-19)×(-7)+(-19)×(-8)+(-19)×(-9)

646≠456

no it's not true

4. 12×(-12)+18×(-12)=6×(-12)[2+3]

-360=-360

yes it's true

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