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Division by Halving      (NT1, N20 pg.63)
 1.           Dividing by 4 = (2 x 2)
             halving then halving again
       Ex. ¼ of 60       60 ÷ 2 = 30
                         30 ÷ 2 = 15
 2.         Dividing by 8 = (2 x 2 x 2)
         Halving, halving then halving again
       Ex. ⅛ of 96       96 ÷ 2 = 48
                         48 ÷ 2 = 24
                         24÷ 2 = 12
3.                 Remember
     i) Dividing by 4 = (2 x 2)
     ii) Dividing by 8 = (2 x 2 x 2 )

     iii) Dividing by 6= (2 x 3) -
        divide by 2 then by 3

     iv) Dividing by 12= (2 x 2 x 3) -
         divide by 2, by 2 again, then by 3

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Book 5 N20 notes

  • 1. Division by Halving (NT1, N20 pg.63) 1. Dividing by 4 = (2 x 2) halving then halving again Ex. ¼ of 60 60 ÷ 2 = 30 30 ÷ 2 = 15 2. Dividing by 8 = (2 x 2 x 2) Halving, halving then halving again Ex. ⅛ of 96 96 ÷ 2 = 48 48 ÷ 2 = 24 24÷ 2 = 12 3. Remember i) Dividing by 4 = (2 x 2) ii) Dividing by 8 = (2 x 2 x 2 ) iii) Dividing by 6= (2 x 3) - divide by 2 then by 3 iv) Dividing by 12= (2 x 2 x 3) - divide by 2, by 2 again, then by 3