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Wednesday, 21 September 2016

Doubling and Halving

Doubling and Halving Show the strategy you used.
 4 x18 =48  ½ of 18 = 6 so 4x6=(24 + 24=48)
3 x 24 = 72 ½ of 24 = 12 so 12 x 3 = (36 + 36 = 72)
 5 x16 = ½ of 16 = 8 so 8x5 = (40+40=80) 
3 x 16 =48 ½ of 16 = 8x3=24+24=48 
4 x 32 =96 ½ of 32 = 16 ½ of 16 = 8x4=32 & 32x3=96 
5 x 12 = 60 ½ of 12=6x5=30+30=60 
14 x 3 =42 ½ of 14 = 7x3=21+21=42 
6 x 18 = 108 ½ 0f 18=9x6=54+54=108 
6 x 24 = 144 ½ of 24=12x6=72+72=144 
2 x 24 = ½ of 24=12x2=24+24=48 
4 x 16 = 64 ½ of 16=8x4=32+32=64 
14 x 10 = 140 ½ of 14=7x10=70+70=140 
12 x 2 = 24 ½ of 12=6x2=12+12=24 14 x 4 = ½ of 14=7x4=28+28=56 
7 x 20 = 140 ½ of 20 =10x7=70+70=140
Red is working out!!!

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