题目内容
【题目】口算
10 + 5 = 2 + 10 = 19 - 7 = 15 + 0 =
14 - 2 = 11 + 8 = 10 - 8 = 9 - 9 =
2 + 13 = 13 - 2 = 3 + 7 = 19 - 7 =
5 + 10 = 10 - 3 = 10 + 7 = 10 + 2 =
11 - 1 + 5 = 13 + 3- 6 = 4 + 6 + 8 = 13 - 1 - 2 =
【答案】15 12 12 15 12 19 2 0 15 11 10 12 15 7 17 12 15 10 18 10
【解析】
略
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