Question

20. Să se calculeze:
a) [312 . 47-123.41 + (1 350 - 42 - 56 521)] : 490;
b) 12 936: {[2 · (2 · 123 - 2424: 12) + 12 350:25] . 3 - 3 225:25);
c) 450 + {[3 (3.41 - 450 : 15):31 +2525 : 25] 2-9240: 132}: 3.
DAU COROANA​

Answer 1

Răspuns:

Explicație pas cu pas:

a)  [312 . 47-123.41 + (1 350 - 42 - 56 521)] : 490  =[312,47-123.41+(-55213)]:490=(189.06-55213):490=-55023:490=-112.29

b) 12 936: {[2 · (2 · 123 - 2424: 12) + 12 350:25] . 3 - 3 225:25) =12936: (2*44+12350:25)*3-3225:25= 12936: 538 *3- 3225: 25=72.13-129 = -56.87

c)  450 + {[3 (3.41 - 450 : 15):31 +2525 : 25] 2-9240: 132}: 3= 450+{[3*(-26.86):31+ 2525:25]*2-9240:132}:3 =450+( 98.41 *2 - 9240:132) :3= 450+126.82 : 3=450+42.27= 492.27