This document discusses doubling and halving numbers. Doubling means to add the same number again to make it twice as big, while halving means to split the number into two equal groups. It then provides examples of doubling and halving various numbers.

1. Doubling and Halving

2. Double Halve This means to add the same number on again to make it twice as big. This means to split the number into two equal groups.

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10. 20 10 out in

11. 18 9 out in

12. 14 7 out in