十几减9PPT新人教版一年级下

十几减9

14 - 9 = 5

圈一圈，算一算。还可以怎样计算？

12 - 9 = 39+( 3 )=12; 12-9=( 3 )。

10-9=1; 1+(2)=(3 )。

树上原来有14只小鸟， 飞走了9只小鸟。

树上还有几只小鸟？

14-9=5(只)原来有15个松果，小松鼠搬走了9 个。

还有几个松果？

15-9=6(个)

11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9

11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9

11-9

12-9 14-9

13-9

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