18 - 9 = ____ 16 - 8 = ____ 14 - 7 = ____ 12 - 6 = ____ 10 - 5 = ____ 8 - 4 = ____ 6 - 3 = ____ 4 - 2 = ____ 2 - 1 = ____ 3 - 1 = ____ 4 - 1 = ____ 5 - 1 = ____ 6 - 1 = ____ 7 - 1 = ____ 8 - 1 = ____ 9 - 1 = ____ 10 - 1 = ____ 11 - 1 = ____ 12 - 1 = ____ 12 - 0 = ____ 11 - 0 = ____ 10 - 0 = ____ 9 - 0 = ____ 8 - 0 = ____ 7 - 0 = ____ 6 - 0 = ____ 5 - 0 = ____ 4 - 0 = ____ 3 - 0 = ____ 2 - 0 = ____ 1 - 0 = ____ 1 - ____ = 0 2 - ____ = 0 3 - ____ = 0 4 - ____ = 0 5 - ____ = 0 6 - ____ = 0 7 - ____ = 0 8 - ____ = 0 9 - ____ = 0 10 - ____ = 0 11 - ____ = 0 12 - ____ = 0

Subtraction: doubles, -0, -1, y-y

排行榜

视觉风格

选项

切换模板

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