2 + 2 = 4, , 1 + 3 = 4, , 4 + 1 = 5, , 5 + 2 = 7, , 6 + 1 = 7, , 3 + 4 = 7, , 7 + 2 = 9, , 8 + 1 = 9, , 9 + 0 = 9, , 4 + 5 = 9, , 5 − 1 = 4, , 6 − 2 = 4, , 7 − 3 = 4, , 8 − 4 = 4, , 9 − 5 = 4, , 10 − 1 = 9, , 10 − 2 = 8, , 9 − 1 = 8, , 8 − 3 = 5, , 7 − 4 = 3, .

Maths

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

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恢復自動保存: ?