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题型:填空题 题类:常考题 难易度:普通
20以内的进位加法和退位减法540(10题)
(从左到右、从下到上依次填写 .)
8 + 4 = 7 + 5 = 7 + 6 = 7 + 8 = 6 + 8 =
5 + 7 = 6 + 7 = 8 + 7 = 7 + 7 = 7 + 9 =
9+2 8+3 10+5 9+9
6+7 10+3 6+5 5+7
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