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# Adding up to 1000

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## Adding up to 1000 Answer Key

1.
$ul({:( ,518),(+,99):})$
• 617

2.
$ul({:( ,741),(+,84):})$
• 825
3.
$ul({:( ,150),(+,250):})$
• 400

4.
$ul({:( ,115),(+,782):})$
• 897
5.
$ul({:( ,308),(+,677):})$
• 985

6.
$ul({:( ,564),(+,435):})$
• 999
7.
$ul({:( ,409),(+,373):})$
• 782

8.
$ul({:( ,499),(+,329):})$
• 828
9.
$ul({:( ,425),(+,275):})$
• 700

10.
$ul({:( ,824),(+,106):})$
• 930
11.
Write five different equations, which each add two three-digit numbers, and equal 1,000. For example:

$500 + 500 = 1000$

vary $+$ vary $= 1000$

vary $+$ vary $= 1000$

vary $+$ vary $= 1000$

vary $+$ vary $= 1000$

vary $+$ vary $= 1000$

12.
Fill in each blank with the missing three-digit number that makes the equation true.

$300 + 200 = 100 +$ 400

165 $+ 235 = 150 + 250$

$680 +$ 220 $= 490 + 410$

$542 + 319 =$ 374 $+ 487$

$703 + 198 = 374 +$ 527
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