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Addition Using Open Number Lines - One atta Time

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30,777 + 18,499 = 7 8 9 4 5 6 1 2 3 0 . c + ( ) - × : ± x/y x x ÷ ^
30,777 40,777 48,777 49,177 49,267 49,276 +10,000 +8,000 +400 +90 +9
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