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