20 – 7 = ?, 18 – 9 = ?, 17 – 5 = ?, 16 – 8 = ?, 15 – 6 = ?, 14 – 4 = ?, 13 – 5 = ?, 12 – 7 = ?, 11 – 2 = ?, 10 – 5 = ?.

Restas (Back & Forth)

由
列印
嵌入

排行榜

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