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Estimate each product for questions 1-16.

1. [tex]23 \times 12[/tex]
- 23 is close to 25.
- 12 is close to 10.
- [tex]25 \times 10 = 250[/tex]

2. [tex]19 \times 24[/tex]
- 19 is close to 20.
- 24 is close to 25.
- [tex]20 \times 25 = 500[/tex]

3. [tex]51 \times 17[/tex]
- 51 is close to 50.
- 17 is close to 20.
- [tex]50 \times 20 = 1000[/tex]

4. [tex]82 \times 78[/tex]
- 82 is close to 80.
- 78 is close to 80.
- [tex]80 \times 80 = 6400[/tex]

5. [tex]12 \times 26[/tex]
- 12 is close to 10.
- 26 is close to 25.
- [tex]10 \times 25 = 250[/tex]

6. [tex]24 \times 62[/tex]
- 24 is close to 25.
- 62 is close to 60.
- [tex]25 \times 60 = 1500[/tex]

7. [tex]48 \times 29[/tex]
- 48 is close to 50.
- 29 is close to 30.
- [tex]50 \times 30 = 1500[/tex]

8. [tex]53 \times 39[/tex]
- 53 is close to 50.
- 39 is close to 40.
- [tex]50 \times 40 = 2000[/tex]

9. [tex]51 \times 23[/tex]
- 51 is close to 50.
- 23 is close to 25.
- [tex]50 \times 25 = 1250[/tex]

10. [tex]53 \times 54[/tex]
- 53 is close to 50.
- 54 is close to 50.
- [tex]50 \times 50 = 2500[/tex]

11. [tex]68 \times 39[/tex]
- 68 is close to 70.
- 39 is close to 40.
- [tex]70 \times 40 = 2800[/tex]

12. [tex]29 \times 43[/tex]
- 29 is close to 30.
- 43 is close to 40.
- [tex]30 \times 40 = 1200[/tex]

13. [tex]62 \times 87[/tex]
- 62 is close to 60.
- 87 is close to 90.
- [tex]60 \times 90 = 5400[/tex]

14. [tex]36 \times 42[/tex]
- 36 is close to 40.
- 42 is close to 40.
- [tex]40 \times 40 = 1600[/tex]

15. [tex]91 \times 77[/tex]
- 91 is close to 90.
- 77 is close to 80.
- [tex]90 \times 80 = 7200[/tex]

Answer :

Sure, let's estimate the products step-by-step. Here’s how we can do it:

1. [tex]\( 23 \times 12 \)[/tex]
- Round 23 to 25.
- Round 12 to 10.
- [tex]\( 25 \times 10 = 250 \)[/tex]
- So, the estimate is 250.

2. [tex]\( 19 \times 24 \)[/tex]
- Round 19 to 20.
- Round 24 to 20.
- [tex]\( 20 \times 20 = 400 \)[/tex]
- So, the estimate is 400.

3. [tex]\( 51 \times 17 \)[/tex]
- Round 51 to 50.
- Round 17 to 20.
- [tex]\( 50 \times 20 = 1000 \)[/tex]
- So, the estimate is 1000.

4. [tex]\( 82 \times 78 \)[/tex]
- Round 82 to 80.
- Round 78 to 80.
- [tex]\( 80 \times 80 = 6400 \)[/tex]
- So, the estimate is 6400.

5. [tex]\( 12 \times 26 \)[/tex]
- Round 12 to 10.
- Round 26 to 30.
- [tex]\( 10 \times 30 = 300 \)[/tex]
- So, the estimate is 300.

6. [tex]\( 24 \times 62 \)[/tex]
- Round 24 to 25.
- Round 62 to 60.
- [tex]\( 25 \times 60 = 1500 \)[/tex]
- So, the estimate is 1500.

7. [tex]\( 48 \times 29 \)[/tex]
- Round 48 to 50.
- Round 29 to 30.
- [tex]\( 50 \times 30 = 1500 \)[/tex]
- So, the estimate is 1500.

8. [tex]\( 53 \times 39 \)[/tex]
- Round 53 to 50.
- Round 39 to 40.
- [tex]\( 50 \times 40 = 2000 \)[/tex]
- So, the estimate is 2000.

9. [tex]\( 51 \times 23 \)[/tex]
- Round 51 to 50.
- Round 23 to 25.
- [tex]\( 50 \times 25 = 1250 \)[/tex]
- So, the estimate is 1250.

10. [tex]\( 53 \times 54 \)[/tex]
- Round 53 to 50.
- Round 54 to 50.
- [tex]\( 50 \times 50 = 2500 \)[/tex]
- So, the estimate is 2500.

11. [tex]\( 68 \times 39 \)[/tex]
- Round 68 to 70.
- Round 39 to 40.
- [tex]\( 70 \times 40 = 2800 \)[/tex]
- So, the estimate is 2800.

12. [tex]\( 29 \times 43 \)[/tex]
- Round 29 to 30.
- Round 43 to 40.
- [tex]\( 30 \times 40 = 1200 \)[/tex]
- So, the estimate is 1200.

13. [tex]\( 62 \times 87 \)[/tex]
- Round 62 to 60.
- Round 87 to 90.
- [tex]\( 60 \times 90 = 5400 \)[/tex]
- So, the estimate is 5400.

14. [tex]\( 36 \times 42 \)[/tex]
- Round 36 to 40.
- Round 42 to 40.
- [tex]\( 40 \times 40 = 1600 \)[/tex]
- So, the estimate is 1600.

15. [tex]\( 91 \times 77 \)[/tex]
- Round 91 to 90.
- Round 77 to 80.
- [tex]\( 90 \times 80 = 7200 \)[/tex]
- So, the estimate is 7200.

These step-by-step estimations should help you understand how to round numbers and calculate approximate products.

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