40+20, 43 + 18 , 27 + 24, 51 + 39, 234 +328 , 30+20, 45 + 27, 43 + 18 , 234 +328 , 27 + 24, 50+40, 234 +328 , 51 + 39, 27 + 24, 43 + 18 , 50+30, 43 + 18 , 51 + 39, 27 + 24, 45 + 27, 230+330, 51 + 39, 43 + 18 , 45 + 27, 234 +328 , Estimate 321 + 295, 500, 600, 100, 400, Estimate 4,699 + 1,987, 8,000, 10,000, 7,000, 6,000, estimate 422 + 211, 1,000, 600, 500, 700.
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Estimation with addition
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Athomason1
Elementary
Math
Number Sense
Place Value
Addition and Subtraction
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