Question

-4*(1/8+9/4)+(1/4:5+7/5)=

Answer 1

-4×(1/8+9/4)+(1/4:5+7/5)=
= -4 × 1+2×9 tot ăsta supra/8 + (1/4×1/5 +7/5)=
= -4 × 19/8 + (1/20 +7/5)=
= -4/1 ×19/8 + 1+4×7 tot ăsta supra/20=
= - 1×19 totul supra/1×2 + 29/20=
= -19/2 +29/20=
= - 10×19+29 tot asta supra/20=
= - 190+29 totul supra/20=
= - 161/20

Answer 2

= -4(1/8+18/8)+(1/4x1/5+7/5)=

=> -4(19/8)+(1/20+28/20)=

=> -19/2 + 29/20 =

= 29/20 - 190/20 = - 161/20