Rounding Decimal Numbers
- 2. Round Off Whole NumbersRememberRound 23 to the nearest tens.Step 1. Underline the digit in the given place. (tens)23Step 2. Circle the number to its right.23Step 3. (a) 3 is less than 5 so the digit in the given place (tens) remains the same.23Step 4. Replace all digits to the right of the given place with zeros.2023, rounded to the nearest ten is 20
- 3. Round Off Whole NumbersRememberRound 146 to the nearest tens.Step 1. Underline the digit in the given place. (tens)Step 2. Step 3. Step 4146, rounded to the nearest ten is
- 4. Round Off Whole NumbersRememberRound 273 to the nearest hundreds.Step 1. Underline the digit in the given place. Step 2. Step 3. Step 4. 273, rounded to the nearest hundred is
- 5. Round Off Whole NumbersRememberRound 995 to the nearest hundreds.Step 1. Underline the digit in the given place. Step 2. Step 3. Step 4. 890, rounded to the nearest hundred is
- 6. Rounding Decimal NumbersRound 5.73 to the nearest tenth (1 decimal place or 1dp).Step 1. Underline the digit in the given place. (tenths) 5.73Step 2. Circle the number to its right. 5.73Step 3. (a) 3 is less than 5 so the digit in the given place (tenths) remains the same. 5.7 Step 4. When rounding decimals, DELETE all digits to the right of the given place. 5.75.73, rounded to the nearest tenth is 5.7
- 7. Rounding Decimal NumbersRound 2.13 to the nearest tenth (1 decimal place or 1dp).Step 1. Underline the digit in the given place. (tenths)Step 2. Step 3. Step 4. 2.13, rounded to the nearest tenth is
- 8. Rounding Decimal NumbersRound 6.378 to the nearest hundredth (2 decimal places or 2dp)..Step 1. Underline the digit in the given place. (HUNDREDTHS) 6.378Step 2. Circle the number to its right. 6.37 8Step 3. (a) 8 is more than 5 so we add 1 to the hundredths place.8 6.378 Step 4. When rounding decimals, DELETE all digits to the right of the given place. 6.386.378, rounded to the nearest hundredth is 6.38.
- 9. Rounding Decimal NumbersRound 9.647 to the nearest hundredth (2 decimal places or 2dp).Step 1. Underline the digit in the given place. (HUNDREDTHS)Step 2. Step 3. Step 4. 9.674, rounded to the nearest hundredth is
- 10. Rounding Decimal NumbersRound 1.4252 to the nearest thousandth (3 decimal place or 3dp).Step 1. Underline the digit in the given place. (thousandths) 1.4252Step 2. Circle the number to its right. 1.4252Step 3. (a) 2 is less than 5 so the digit in the given place (thousandths) remains the same. 1.425 Step 4. When rounding decimals, DELETE all digits to the right of the given place. 1.4251.4252, rounded to the nearest thousandth is 1.425
- 11. Rounding Decimal NumbersRound 7.4318 to the nearest thousandth (3 decimal place or 3dp).Step 1. Underline the digit in the given place. (thousandths)Step 2. Step 3. Step 4. 7.4318, rounded to the nearest thousandth is
- 12. Rounding Decimal NumbersNow do pages 96, rounding to the nearest………….Do page 97, rounding to ….. decimal places
- 13. Rounding Decimal NumbersNow do pages 96, rounding to the nearest………….
- 14. Rounding Decimal NumbersDo page 97, rounding to ….. decimal places
- 15. Rounding Decimal Numbers9+1= 105+1 = 6
- 16. Rounding Decimal Numbers9 + 1 = 102 + 1 = 3
- 17. Rounding Decimal Numbers9 + 1 = 109 + 1 = 106+1 = 7
- 18. Rounding Decimal NumbersNow do pages 100, 101 rounding to ….. decimal places, to the nearest………….Do page 102, 104 rounding
- 19. Page 100
- 20. Try These 4Page 100
- 21. Page 101Try These 5Round the numbers to the place indicated.
- 22. Page 102
- 23. Page 104
- 24. Rounding Decimal NumbersComplete Exercise 3.2 onpages 105 and 106
- 28. . Round each number as indicated.a. 4.231 to 2 decimal places ____________b. 0.75 to 1 decimal place ____________c. 2.076 to 2 decimal places ___________d. 0.698 to 2 decimal places ____________e. 23.357 to 1 decimal place ____________f. 48.6929 to 3 decimal places____________g. 639.678 to the nearest hundred ____________h. 12.364 to the nearest ten ____________i. 95.89 to the nearest ten ____________j. 5783.22 to the nearest hundred ____________