Well, if there are 2 halves in 1 whole, 2x4=8. Or you could count as 2, 4, 6, 8.
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You can make 4 wholes from 8 halves.
There are 16 halves in eight wholes.
2 ÷ 1/2 = 2 x 2/1 = 4 Alternatively: 1 whole is 2 halves → 2 wholes = 2 x 2 halves = 4 halves.
10 halves in 5 wholes.
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