1. Calculer : 1 + 11 + 111 +1 111 + 11 111 =
a 12 355
b 12 345
c 12 365
d 12 375
2. 5 + 55 + 555 + 5 555 + 55 555 =
a 51 725
b 61 725
c 72 725
d 41 725
3. 9 + 99 + 999 + 9 999 + 99 999 =
a 110 105
b 110 805
c 111 105
d 112 105
4. 11 111 + 22 222 + 33 333 + 44 444 =
a 111 110
b 110 110
c 112 110
d 113 110
5. 1,11 + 1,111 + 1,1111 =
a 3,3331
b 3,3341
c 3,3321
d 3,3351
6. 1,11 x 9,99 =
a 11,0879
b 11,0889
c 11,0899
d 11,0869
