Tommy used benchmark fractions to estimate the sum of 1

5

+

3

7

as 1. Tommy's teacher said he was incorrect. Explain what error Tommy might have made and what tips you can give him to solve the problem correctly.

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Excerpt from marsupials carole jenkins they are basically very timid animals and 5 exscape from their enemies by jumping away on their strong and powerful hind legs. look at the underlined section labelled 5. there may be a mistake in punctuation, capitalization, or spelling. if you find a mistake choose the answer that corrects the mistake. if there is no mistake, choose ‘correct as is.’ a) correct as is. b) escape from their enemies by jumping away c) exscape from there enemies by jumping away d) exscape from their enemie’s by jumping away