Slide 1: Title: Rounding off to the Nearest Tens

Slide 2: Objective: By the end of this lesson, you will be able to round off numbers to the nearest tens.

Slide 3: What is rounding off? - Rounding off is a way to estimate a number to a certain place value. - It makes numbers easier to work with and understand.

Slide 4: When do we round off to the nearest tens? - We round off to the nearest tens when we want to simplify a number to the nearest multiple of 10.

Slide 5: How to round off to the nearest tens? - Look at the digit in the ones place. - If the digit is 0, 1, 2, 3, or 4, we round down to the previous tens. - If the digit is 5, 6, 7, 8, or 9, we round up to the next tens.

Slide 6: Example 1: Round off 37 to the nearest tens. - The digit in the ones place is 7. - Since 7 is greater than 4, we round up to the next tens. - The nearest tens to 37 is 40.

Slide 7: Example 2: Round off 82 to the nearest tens. - The digit in the ones place is 2. - Since 2 is less than 5, we round down to the previous tens. - The nearest tens to 82 is 80.

Slide 8: Example 3: Round off 95 to the nearest tens. - The digit in the ones place is 5. - Since 5 is equal to 5, we round up to the next tens. - The nearest tens to 95 is 100.

Slide 9: Practice Exercise: Round off the following numbers to the nearest tens: 1) 63 2) 48 3) 77 4) 92

Slide 10: Solution: 1) 60 2) 50 3) 80 4) 90

Slide 11: Summary: - Rounding off is a way to estimate a number to a certain place value. - We round off to the nearest tens when we want to simplify a number to the nearest multiple of 10. - If the digit in the ones place is 0, 1, 2, 3, or 4, we round down to the previous tens. - If the digit in the ones place is 5, 6, 7, 8, or 9, we round up to the next tens.

Slide 12: Conclusion: - You have learned how to round off numbers to the nearest tens. - Practice rounding off numbers to become more confident in this skill.

Slide 13: Thank you for your attention! - Any questions?