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