Ferns Follow-up Wk 4 T2

WALT:  Solve multiplication problems using doubling and halving

Solve these problems.  Which number in each problem will you halve?  Which one will you double?  

10 x 7 =70

Is the same as

14x5   =70

15 x 4 =60

Is the same as

 30   X2  =2

6 x 5 =30

Is the same as

  10  X 3        =30

10 x 3 =30

Is the same as

  6  X  5       =30

4 x 5 =20

Is the same as

   10 X  2    =20

2 x 14 =28

Is the same as

 4   X    7     =28 

18 x 5 =90

Is the same as

 10   X     9    =90

8x 9 =72

Is the same as

   12 X   6      =72

8 x 7 =56

Is the same as

  14  X    4     =56