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