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1“... for problem solving is a useful tool for people to understand the world and our environment. For this reason...”
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2“... more valid determinations. For this reason the aim of the study is to evaluate the concept images...”
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3“... flexibly when mentally computing, estimating, judging number magnitude, and judging reasonableness...”
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4“... the mathematics teachers to the first blank and to explain the reasons why they wrote this metaphor. The data...”
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