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