1. © T Madas

2. What number must I square to get 25? The square root of 25 is 5

3. © T Madas What number must I square to get 4? The square root of 4 is 2

4. © T Madas What number must I square to get 64? The square root of 64 is 8

5. © T Madas What number must I square to get 121? The square root of 121 is 11

6. © T Madas 0.EXP Ans = 123 + – 456 x ÷ 789 DEL AC RCLENG(),M+ (–).,,,hypsincostan a b/ca b/c x2x2 logln x -1 nCrPol( REPLAY ^ ^ ^ ^ SHIFT ALPHA MODE ON x!x! nPr Rec( x3x3 d/cd/c 10 x exex ^ sin -1 cos -1 tan -1 M- OFF STO π DRG› %Rnd Ran# A BC D E F X Y M ; e : CLR 9 1 6 6 9 3131 961 = 31 1 =

7. © T Madas What number must I square to get 6.25? The square root of 6.25 is 2.5 We must now use a calculator Find the button on your calculator

8. © T Madas 0.EXP Ans = 123 + – 456 x ÷ 789 DEL AC RCLENG(),M+ (–).,,,hypsincostan a b/ca b/c x2x2 logln x -1 nCrPol( REPLAY ^ ^ ^ ^ SHIFT ALPHA MODE ON x!x! nPr Rec( x3x3 d/cd/c 10 x exex ^ sin -1 cos -1 tan -1 M- OFF STO π DRG› %Rnd Ran# A BC D E F X Y M ; e : CLR 5 0 0 0 5 22.3606 7978 500 ≈ 22.36067978 0 =

9. © T Madas What number must I square to get 10? The square root of 6.25 is 3.16 rounded to 2 decimal places We use a calculator again Find the button on your calculator

10. © T Madas 5 25 5252 Squaring Take the square root “un-squaring”

11. © T Madas Squaring Take the square root Inverse Operations

12. © T Madas

13. Calculate the following Square Roots WITHOUT a calculator:

14. © T Madas Calculate the following Square Roots to 2 decimal places, using a calculator:

15. © T Madas Calculate the following Square Roots to 2 decimal places, using a calculator:

16. © T Madas

17. Calculate the following Square Roots WITHOUT a calculator:

18. © T Madas Calculate the following Square Roots to 2 decimal places, using a calculator:

19. © T Madas Calculate the following Square Roots to 2 decimal places, using a calculator:

20. © T Madas