Wednesday 30 May 2012

Doubling and Halving

Solve these problems using 'doubling and halving'

1. 18 X 5 =

2. 8 X 6 =

3. 8 X 3 =

4. 14 X 3=

5. 12 X 5 =

Solve these problems using 'halving'

1. 96 ÷ 4 =

2. 90 ÷ 2 =

3. 40 ÷ 4 =

4. 18 ÷ 2 =

5. 44 ÷ 4 =  
  
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3 comments:

  1. Isabelle30 May 2012 at 21:55

    18x5=90 8x6=48 8x3=24 14x3=42 12x5=60
    9x10=90 4x12=48 4x6=24 7x6=42 6x10=60

    ReplyDelete
  2. G430 May 2012 at 23:46

    Teno pai Isabelle, did your answers show that you knew how to use each strategy?

    e.g.
    18 x 5 = 90
    9 X 10 = 90

    ReplyDelete
  3. Anonymous13 June 2012 at 23:47

    96%4=24 90%2=45 40%4=10 18%2=9 44%4=11
    48%2=24 45%1=45 20%2=10 9%1=9 22%2=11
    By Isabelle!!!!!!!

    ReplyDelete

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