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