7 - 9-5-3+7-1, 8 - 9-6-3+2+6, 4 - 8+1-6-2+3, 6 - 3-1+7-9+6, 0 - 3-2+5+3-9, 2 - 7-6+7-1-5, 1 - 9-8+1+2-3, 3 - 9-8+1+2-1, 5 - 2+1-2+7-3, 9 - 1+3-2+1+6,

Mental counting with 5 numbers

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