Răspuns :
(400 + 290) : 2 = 690 : 2 = 345
b) 869 * 3 - 869 * 2 = 2607 - 1738 = 869
c) 288 : 3 * 3 = 96 * 3 = 288
288 + 3 = 291
288 + 191 = 579
d) 3 * (1000000 - 999542) = 3 * 458 = 1374
b) 869 * 3 - 869 * 2 = 2607 - 1738 = 869
c) 288 : 3 * 3 = 96 * 3 = 288
288 + 3 = 291
288 + 191 = 579
d) 3 * (1000000 - 999542) = 3 * 458 = 1374
1) (400+290):2+(400-290)=
=690:2+110=345+110=455
2) (869×3)-(869×2)=2.607-1.738=869
3) (288:3)×3+(288+3)=288+291=579
4) (1.000.000-999.542)×3=458×3=1374