Explain how to estimate 368+231 two different ways

2
by soccer423

2015-10-08T20:02:14+08:00

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368+231=599    it is to round of 368 to the nearest hundreds
400+200=600    add 100 if the hundredth number is 5 and above and add 0 if its 4 and below...

FROM: Jehiel S. Estrebello :)
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Hmm, Jehiel S. Estrebello, you gave only one way to estimate. Where is the other way to estimate the sum?
2015-10-08T20:02:37+08:00

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then estimate; 599 to 600(hundreds), 599 to 600(tens)

2:estimate first; 400+200(hundreds)