Question

calculati:
a)-1 *[(-4)+(-2)*(-6)+(-6-4):2]-(2-5)
b)-14+{13-6*[20-7*(-3)]}:(-238)
p.s * inseamna inmultire
va rog repede

Answer 1

a) -1×[(-4)+(-2)×(-6)+(-6-4):2]-(2-5)
= -1×[(-4)+(+12)+(-10):2]-(-3)=
= -1×[(-4)+12±10:2]+3=
= -1×[(+8)+5]+3=
= -1×(+13)+3=
= -13+3=
= -10

b) -14+{13-6×[20-7×(-3)]}:(-238)=
= -14+[13-6×(20+21)]:(-238)=
= -14+[13-6×(+41)]:(-238)=
= -14+(13-246):(-238)=
= -14+(-233):(-238)=
= -14+233:(-238)
(Mai departe nu-mi iese)
SORRY