Question

ajutir repede dau coroana
17×(-100)+(-100)×(-7)=
-25×300-(-25)×400=
-12×10+(-12)×40=
-50×38+(-50)×(-28)=
-120×20-(-120)×5=
-42×50+(-42)×(-40)=
172×(-5)+(-5)×(-72)=​

Answer 1

Răspuns:

17×(-100)+(-100)×(-7)=-1000

-25×300-(-25)×400=2500

-12×10+(-12)×40=-600

-50×38+(-50)×(-28)=-500

-120×20-(-120)×5=-1800

-42×50+(-42)×(-40)=-420

172×(-5)+(-5)×(-72)= -500

Explicație pas cu pas:

Answer 2

17×(-100)+(-100)×(-7)=

=(-1700)+700=-1000

-25×300-(-25)×400=

=-7500+25×400=

=-7500+10000=2500

-12×10+(-12)×40=

=-120-480=-600

-50×38+(-50)×(-28)=

-50×(38-28)=

=-50×10=-500

-120×20-(-120)×5=

=-2500+120×5=

=-2500+600=-1800

-42×50+(-42)×(-40)=

=-42(50-40)=

=-42×10=-420

172×(-5)+(-5)×(-72)=

=-172×5+5×72=

=-5×(172-72)=

=-5×100=-500