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Càlcul mental
Contributed by: Perez
  • 1. 12*12
A) 24
B) 122
C) 121
D) 144
  • 2. 13*13
A) 169
B) 121
C) 256
D) 196
  • 3. 15*15
A) 256
B) 1515
C) 30
D) 225
  • 4. 17*17
A) 169
B) 361
C) 298
D) 289
  • 5. 20*20
A) 400
B) 20
C) 40
D) 200
  • 6. 19*19
A) 121
B) 261
C) 361
D) 39
  • 7. 14+14
A) 144
B) 256
C) 196
D) 28
  • 8. 11*13
A) 133
B) 153
C) 143
D) 145
  • 9. 18*18
A) 324
B) 164
C) 264
D) 364
  • 10. 11*11
A) 22
B) 121
C) 111
D) 1111
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