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整十数 加减整十数

整十数 加减整十数. 第一关: 10 以内的加减法。. 9. 9. 7. 3+2= 2+7= 4+5= 3+4= 7 - 3= 9 - 4= 6 - 3= 8 - 2=. 5. 4. 3. 5. 6. 第二关:我会填。. 80. 50. ( 1 )、 8 个十是( ); 5 个十是( ); ( 2 )、 60 里面有( )个十;

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整十数 加减整十数

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  1. 整十数 加减整十数

  2. 第一关:10以内的加减法。 9 9 7 3+2= 2+7= 4+5= 3+4= 7-3= 9-4= 6-3= 8-2= 5 4 3 5 6 第二关:我会填。 80 50 (1)、8个十是( );5个十是( ); (2)、60里面有( )个十; 90里面有( )个十。 6 9

  3. 第三关:这是多少根小棒? 10 20 30 像10、20、30…这样的数,我们叫他们整十数。

  4. 你能提出一个用加法或减法解决的问题吗? 1.红花和黄花一共有多少盆? 红花有10盆 10+20= (盆) 30 2.红花和紫花一共有多少盆? 10+30= (盆) 40 3.黄花和紫花一共有多少盆? 20+30= (盆) 50 黄花有20盆 4. 黄花比红花多多少盆? 20 - 10= (盆) 10 5. 紫花比红花多多少盆? 30 - 10= (盆) 20 6. 紫花比黄花多多少盆? 紫花有30盆 30 - 20= (盆) 10

  5. 我要搬走10盆。 还有多少盆紫花? 30-10= (盆) 20

  6. 30+40= 70 70-40= 30 20 + 40= 60

  7. 90 - 20= 7 ( ) × 50 - 30= 80 ( ) × 40 + 1= 50 ( ) × 30 + 20= 10 ( ) × 80 - 30= 50 ( ) √ 10 + 50= 60 ( ) √

  8. 40 90 50 80 80 30

  9. 信箱 信箱 信箱 60 70 40 50 20 80 10+40 50+30 90-20 50+10 60-40 80-40

  10. = 我们班女同学有30名。 男同学有20名。 (1)我们一共有多少名同学? 20 + 30 50 (名) (2)有10人刚才请假先走了,现在有多少名学生? 40 50 - 10 (名)

  11. 50 30+20= 加 是 3个十 2个十 5个十

  12. 再见

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