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SQUARES AND SQUARE ROOTS OF NUMBERS

    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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