examples of addition, subtraction and estimation of their Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens): 439 + 334 + 4,317
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- Technology is the sum of techniques, skills, methods, and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation.
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50rounding to nearest tens =50909
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