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Addition up to 20

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Addition up to 20 Answer Key

Instructions: Fill in each blank with the number that makes each picture or number sentence true.

1. 
One CubeOne CubeOne CubeOne CubeOne Cube [math]+ 10 =[/math] 15
2. 
[math]14 +[/math]One CubeOne CubeOne CubeOne Cube [math]=[/math] 18
3. 
One CubeOne CubeOne CubeOne CubeOne CubeOne Cube [math]+[/math] 11[math]= 17[/math]
4. 
[math]20[/math] [math]=[/math] 13 [math]+[/math] One CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne Cube
5. 
[math]7[/math] [math]=[/math] One CubeOne Cube[math]+[/math]5
6. 
12 [math]=[/math] One CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne Cube [math]+ 4[/math]
7. 
16 [math]= 9 +[/math] One CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne Cube
8. 
12 [math]+[/math] One Cube[math]= 13[/math]
9. 
3 [math]+ 8 =[/math] One CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne Cube
10. 
[math]10 +[/math]One CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne CubeOne Cube [math]=[/math] 19
11. 
[math]2 + 5 =[/math]7
12. 
[math]1 +[/math] 9 [math]= 10[/math]
13. 
[math]4 + 8 = [/math]12
14. 
3[math]+ 6 = 9[/math]
15. 
[math]7 + 7 =[/math] 14
16. 
[math]7 +[/math] 8 [math]=15[/math]
17. 
9 [math]+ 9[/math] [math]= 18[/math]
18. 
[math]0 + 8 =[/math] 8
19. 
[math]6 +[/math] 5 [math]= 11[/math]
20. 
9 [math]+ 8[/math][math]= 17[/math]

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