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Open number lines

English 5 Public

Open number lines

Study Slideshow

What is this?

an open number line

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472 + ______ = ______

472+55=527

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275 + ______ = ______

275 + 424 = 699

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723 + ______ = ______

723 + 145 = 868

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If we want to solve 245 + 35 by using an open number line, what number should we mark first?

245, the larger addend

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