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Mathematics, 02.07.2020 08:01 gavincoscarat760

Lyra thinks about 642 + 229 as 642 + 200 + 30 - 1 to solve in her head. Label the missing numbers on Lyra's number line to justify her thinking.

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Lyra thinks about 642 + 229 as 642 + 200 + 30 - 1 to solve in her head. Label the missing numbers o...
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