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凑十法练习题 字体大,适合小朋友练习

2022-01-25 来源:汇智旅游网
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20以内退位减法———破十法、凑十法复习

【重点知识】

凑十法:进位加法使用

凑十法口诀:看大数,分小数,凑成十,算得数.

凑十法儿歌:小朋友来拍拍手,大家来唱凑十歌。一凑九,二凑八,三凑七来四凑六,五五相凑就满十。

9 + 2 = 9 + 3 = 9 + 7 =

8 + 5 =

8 + 4 =

9 + 4 = ;.

8 + 8 = 8 + 3 = 9 + 8 = 8 + 7 = 8 + 6 = 9 + 5 = .

8 + 6 = 8 + 7 = 9 + 7 =

7 + 4 =

9 + 4 =

8 + 6 = ;. 7 + 6 = 9 + 5 = 8 + 7 = 7 + 5 = 9 + 6 = 8 + 8 = .

6 + 8 = 7 + 9 = 8 + 9 =

5 + 8

4 + 8

3 + 8 ;. = = = 7 + 8 6 + 9 5 + 9 = = = 4 + 9 3 + 9 8 + 8 =

=

=

.

;.

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