Question

Va rog ajutor!!!Dau 15 puncte și o coroana!!!Ajutorrrrr!!!Va rog

Answer 1

Explicație pas cu pas:

a)

99:(101-90) = 99 : 11 = 9

1 000 - (72:3 + 452) = 1 000 - (24 + 452) = 1 000 - 476 = 524

(107 + 13) - (87 +9) = 120 - 96 = 24

310 + 188 x (954:9:2) = 310 + 188 x (106 : 2) =

= 310 + 188 × 53 = 310 + 9 964 = 10 274

(270 x 4 + 139 x 3) - 5 x 178 = (1 080 + 414) - 890 = 1494 - 890 = 604

100 x ( 22 x 2:4 -4:4) = 100 × (44 : 4 - 1) = 100 × (11 - 1) = 100 × 10 = 1 000

800 - (46:2 x 10 + 70) = 800 - (23 × 10 + 70) = 800- (230 + 70) = 800 - 300 = 500

b)

[(75 + 5) x 9 - 20]: 100 = (80 × 9 - 20) : 100 = (720 - 20) : 100 = 700 : 100 = 7

401 - 2 x [(107 + 123) -(104 +8)] = 401 - 2 × (230 - 112) = 401 - 2 × 118 = 401 - 236 = 165

586 + 5 x [138 + 936: (321 - 317)] = 586 + 5 × (138 + 936 : 4) = 586 + 5 × (138 + 234) = 586 + 5 × 372 = 586 + 1 860 =

= 2 446

[(3 x 167 - 3) x 153)] - (450 x 2 +12) =

= [(501 - 3) × 153] - (900 + 12) =

= (498 × 153) - 912 = 76 194 - 912 = 75 282

416 x 4 - 518: [(38 x 0 + 200): 100] = 1 664 - 518 : [(0 + 200) : 100] = 1 664 - 518 : (200 : 100) = 1 664 - 518 : 2 =

1664 - 259 = 1 405

729 + 3 000: 100 x [76 + (893 - 809)] = 729 + 30 × (76 + 84) = 729 + 30 × 160 = 729 + 4 800 = 5 529

[(6 251 -4 999) x 8+ 600: 15] x 0 = (1 252 × 8 + 40) × 0 =

= (10 016 + 40) × 0 = 10 056 × 0 = 0