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Let's think about ways to simplify calculations

Title Let's think about ways to simplify calculations 1 KOIKE Kohji 2013.06.28 Oshihara Elementary School, Showa Township Schools KOIKE Kohji Elementary School G-3（9 years old） Math Students can tackle mental calculation of the differences of two 2-digit numbers in this lesson by reflecting on the discussion of mentally calculating the sums of two 2-digit numbers in the previous day's lesson. Students will be thinking about ways to mentally calculate by decomposing numbers based on different properties of operations and using approximate numbers. It is hoped that students will be able to take advantage of their learning in the previous lesson. Therefore, in today's lesson, the emphasis is placed on representing own ideas using equations, expressions, diagrams, and words, and organizing their mental calculation processes clearly. For this purpose, it is necessary that students must interpret other's ideas and compare and contrast with their own ideas. During the whole class discussion, the activity of interpreting equations and expressions and representing ideas expressed in words using equations and expressions. Then, by having students reflect on their own ideas in light of other's ideas, we hope to help students identify more efficient(faster and simpler) ways of mental calculation. You need Facebook account to show rating and accept"Join Rating IMPULS". 0% （0 people /0people voted "like it"）

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