正确: 1 + 3 = 4, 4 + 2 = 6, 10 + 3 = 13, 12 + 4 = 16, 7 + 7 = 14, 18 + 1 = 19, 8 + 5 = 13, 6 + 9 =15, 不正确: 4 + 3 = 6, 15 + 5 = 19, 12 + 5 = 19, 8 + 3 = 10, 9 + 4 = 15, 11 + 6 = 16, 4 + 5 = 8, 8 + 11 = 20,

1年级加法练习(20以内的加法)

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