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