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Adding up to 1000

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Adding up to 1000 Answer Key

1. 
[math]ul({:( ,518),(+,99):})[/math]
  • 617
 
2. 
[math]ul({:( ,741),(+,84):})[/math]
  • 825
3. 
[math]ul({:( ,150),(+,250):})[/math]
  • 400
 
4. 
[math]ul({:( ,115),(+,782):})[/math]
  • 897
5. 
[math]ul({:( ,308),(+,677):})[/math]
  • 985
 
6. 
[math]ul({:( ,564),(+,435):})[/math]
  • 999
7. 
[math]ul({:( ,409),(+,373):})[/math]
  • 782
 
8. 
[math]ul({:( ,499),(+,329):})[/math]
  • 828
9. 
[math]ul({:( ,425),(+,275):})[/math]
  • 700
 
10. 
[math]ul({:( ,824),(+,106):})[/math]
  • 930
11. 
Write five different equations, which each add two three-digit numbers, and equal 1,000. For example:

[math]500 + 500 = 1000[/math]

vary [math]+[/math] vary [math]= 1000[/math]


vary [math]+[/math] vary [math]= 1000[/math]


vary [math]+[/math] vary [math]= 1000[/math]


vary [math]+[/math] vary [math]= 1000[/math]


vary [math]+[/math] vary [math]= 1000[/math]
 
12. 
Fill in each blank with the missing three-digit number that makes the equation true.

[math]300 + 200 = 100 +[/math] 400


165 [math]+ 235 = 150 + 250[/math]


[math]680 +[/math] 220 [math]= 490 + 410[/math]


[math]542 + 319 =[/math] 374 [math] + 487[/math]


[math]703 + 198 = 374 +[/math] 527

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