Question

1. Tính:

a, (-50) . 37

b, (-20) . (-14) . 25

c, 40 . (-30) .12

2, Tính :

a, -40 . [(-15) + 30]

b, -5 . [(-27) - (-7)]

c, -10 . [(-28 + (-22) - 10]

Giúp mik vs đc hong! Tớ đang cần gấp lắm 

Answer 1

\(1)\)

\(a)(-50).37=-1850\)

\(b)(-20).(-14).25=280.25=7000\)

\(c)40.(-30).12=-1200.12=-14400\)

\(2)\)

\(a)\)

\(-40.[(-15)+30)]\)

\(=-40.15\)

\(=-600\)

\(b)\)

\(-5 . [(-27) - (-7)]\)

\(=-5 . [(-27)+7]\)

\(=-5 . (-20)\)

\(=100\)

\(c)\)

\(-10 . [(-28) + (-22) - 10]\)

\(=-10 . [-50 - 10]\)

\(=-10.(-60)\)

\(=600\)