6

1 . 5²=5×5=25

2. 5³=5×5×5=125

3. 2,7²=2,7×2,7=7,29

4. 2,7³=2,7×2,7×2,7=19,683

5. (-3)²= -3×(-3)=9

6. (-3)³= -3×(-3)×(-3)= -27

7. (-0,2)²= -0,2×(-0,2)=0,04

8. (-0,2)³= -0,2×(-0,2)×(-0,2)= -0,008

9. (4/9)²=4²/9²=(4×4)/(9×9)=16/81

10. (4/9)³=4³/9³=(4×4×4)/(9×9×9)=64/729

11. (1 1/6)²=(7/6)²=7²/6²=(7×7)/(6×6)=

=49/36=1 13/36

12. (1 1/6)³=(7/6)³=7³/6³=(7×7×7)/(6×6×6)=

=343/216=1 127/216