What learning tools do you need to prepare for the first volume of the fifth grade mathematics in Beijing Normal University?

Ruler and protractor, calculator.

1, ruler and protractor: used for measuring and drawing to help students understand the concepts and operations of length and angle.

2. Calculator: Used for complex calculations. Students can use calculators properly in their study, but they should also be encouraged to master basic calculation skills.

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Fill in the appropriate company name. (1) A math book weighs about 200 _ _ _ _ _ _ _ _ _ (2) A desk weighs about 7 _ _ _ _ _ _ _ _ _ (3) A bag of flour weighs 45 _ _ _ _ _ _ _ _ _ _ _ _ (4

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