Adding three or four single-digit numbers Mentally (2nd grade math)
In this 2nd grade lesson, we delve into mental addition of several single-digit numbers — sums such as 6 + 8 + 5 or 9 + 9 + 4 + 5 and similar. In adding four numbers, it often works to first add them in pairs. Another useful strategy in mental math is t
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08/30/2020 04:09 PM
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