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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