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Lesson 4-8 Example 3

4-8. Lesson 4-8 Example 3. Find the product of 231 and 7. Estimate first. Step 1 Estimate. 200 × 7 = 1,400. 4-8. Lesson 4-8 Example 3. Find the product of 231 and 7. Estimate first. Step 2 Rewrite the problem in vertical format. 231 × 7. 4-8. Lesson 4-8 Example 3.

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Lesson 4-8 Example 3

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  1. 4-8 Lesson 4-8 Example 3 Find the product of 231 and 7. Estimate first. Step 1 Estimate. 200 × 7 = 1,400

  2. 4-8 Lesson 4-8 Example 3 Find the product of 231 and 7. Estimate first. Step 2 Rewrite the problem in vertical format. 231× 7

  3. 4-8 Lesson 4-8 Example 3 Find the product of 231 and 7. Estimate first. Step 3 Multiply 7 times the digit in the ones column. 7 × 1 = 7 231× 7 7

  4. 4-8 Lesson 4-8 Example 3 Find the product of 231 and 7. Estimate first. Step 4 Multiply 7 times the digit in the tens column. 7 × 3 = 21 2 231× 7 1 7

  5. 4-8 Lesson 4-8 Example 3 Find the product of 231 and 7. Estimate first. Step 5 Multiply 7 times the digit in thehundredscolumn. 7 × 2 = 14 Add twofor 16. 2 231× 7 1 1,6 7

  6. 4-8 Lesson 4-8 Example 3 Find the product of 231 and 7. Estimate first. Step 6 The product is 1,617. Compare to your estimate for reasonableness.

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