Răspuns :
5 × ( 50 × 20 - 12 × 56 ) - 800 × 2 = 40
= 5 × ( 1 000 - 672 ) - 1 600 =
= 5 × 328 - 1 600 =
= 1 640 - 1 600 =
= 40
= 5 × ( 1 000 - 672 ) - 1 600 =
= 5 × 328 - 1 600 =
= 1 640 - 1 600 =
= 40