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SQUARES AND SQUARE ROOTS OF NUMBERS (1- digit and 2 – digit numbers)

 

Example: 1: find 22 = 4 2

=( 2 x 2) + ( 4 x 4)

= 4 + 16

= 20

Example 2: find 42 – 22

= (4×4) – (2 x 2)

= 16 – 4

= 12

Example 3: find 32 + 32

= (3 x 3) + (3 x 3)

= 9  +  9

= 18

Example 4: 102 – 42

                  = (10 x 10) – (4 x 4)

= 100 – 16

= 84

 

Exercise 1

Find the value of:

  1. 42 + 62
  2. 52 – 22
  3. 5­­­­­2 + 72     
  4. 102 – 52
  5. 82 + 102
  6. 82 – 62
  7. 22 x 52
  8. 32 x 42
  9. 42 x 32
  10. 52 x 22
  11. 62 x22
  12. 22 x 32 x 52
  13. 22 x 32 x 52
  14. 32 x 22 x 52

 

See also

MULTIPLICATION OF NUMBERS

Area

Length

Rates

Algebraic

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