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3. NUMBERS TO 10,000. Tens of thousands. Four-digit numbers. Compare four-digit numbers. Addition of numbers within 10 000. Subtraction of numbers within 10 000. What can you do?. May. Gram Milliliter. Multiply a four-digit number by a single-digit number. Divide a four-digit number by a one-digit number What can you do?. Right angle, non-square angle. Rectangle. Square Perimeter of a triangle, perimeter of a quadrilateral Perimeter of a rectangle. Perimeter of square Statistical table. The probability of an event happening. What can I do? Practice and experience: Calculate the perimeter of the classroom floor, the perimeter of the school yard 4. NUMBERS TO 100,000. Hundred thousand. Five-digit numbers. Comparing five-digit numbers Addition of numbers within 100000. Subtraction of numbers within 100000. What can you do? Multiply a five-digit number by a single-digit number. Divide a five-digit number by a one-digit number What can you do? Area of ​​a square centimeter. Rectangular area. Area of ​​square Vietnam money. The creative heavens REVIEW YEAR-END. review of calculations review geometry and measurement Review of some elements of statistics and probability Practice and experience Glossary