Question

Calculati:
a) [3x(-12)-14x(-12)+(-6)x8]:(-4)+3=
b) [(-13)x15+(18-72)-(-21):(-3)]x7-7=
c) {(-42):(-7)-(-42)x(-7)+[(-12)-8x11]}=
d) -11-{-20-[(-63):(-21)+17x(-9)]}x3=

Answer 1

Răspuns:

a) [3x(-12)-14x(-12)+(-6)x8]:(-4)+3= (-36 +168 -48 ):(-4) +3= 84 : (-4) +3= -21+3= -18

b)  [(-13)x15+(18-72)-(-21):(-3)]x7-7= (-195 - 54 - 7) x7-7 = -256 x7-7 =

= -1792-7= -1799

c) {(-42):(-7)-(-42)x(-7)+[(-12)-8x11]}= [ 6 -294+(-12-88)]= ( 6-294 -12-88)

=6-394 = - 388

d) -11-{-20-[(-63):(-21)+17x(-9)]}x3= -11 - [ -20 -( 3 -153)]x3= -11 - (-20+150)x3=

=-11 - 130x3= -11- 390=-401