1. Rounding Decimal Numbers

2. Round Off Whole Numbers Remember Round 23 to the nearest tens. Step 1. Underline the digit in the given place. (tens) 23 Step 2. Circle the number to its right. 23 Step 3. (a) 3 is less than 5 so the digit in the given place (tens) remains the same. 23 Step 4. Replace all digits to the right of the given place with zeros. 20 23, rounded to the nearest ten is 20

3. Round Off Whole Numbers Remember Round 146 to the nearest tens. Step 1. Underline the digit in the given place. (tens) Step 2. Step 3. Step 4 146, rounded to the nearest ten is

4. Round Off Whole Numbers Remember Round 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 Numbers Remember Round 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 Numbers Round 5.73 to the nearest tenth (1 decimal place or 1dp). Step 1. Underline the digit in the given place. (tenths) 5.73 Step 2. Circle the number to its right. 5.73 Step 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. 5.7 5.73, rounded to the nearest tenth is 5.7

7. Rounding Decimal Numbers Round 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 Numbers Round 6.378 to the nearest hundredth (2 decimal places or 2dp).. Step 1. Underline the digit in the given place. (HUNDREDTHS) 6.378 Step 2. Circle the number to its right. 6.37 8 Step 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. 6.38 6.378, rounded to the nearest hundredth is 6.38.

9. Rounding Decimal Numbers Round 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 Numbers Round 1.4252 to the nearest thousandth (3 decimal place or 3dp). Step 1. Underline the digit in the given place. (thousandths) 1.4252 Step 2. Circle the number to its right. 1.4252 Step 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. 1.425 1.4252, rounded to the nearest thousandth is 1.425

11. Rounding Decimal Numbers Round 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 Numbers Now do pages 96, rounding to the nearest…………. Do page 97, rounding to ….. decimal places

13. Rounding Decimal Numbers Now do pages 96, rounding to the nearest………….

14. Rounding Decimal Numbers Do page 97, rounding to ….. decimal places

15. Rounding Decimal Numbers 9+1= 10 5+1 = 6

16. Rounding Decimal Numbers 9 + 1 = 10 2 + 1 = 3

17. Rounding Decimal Numbers 9 + 1 = 10 9 + 1 = 10 6+1 = 7

18. Rounding Decimal Numbers Now do pages 100, 101 rounding to ….. decimal places, to the nearest…………. Do page 102, 104 rounding

19. Page 100

20. Try These 4 Page 100

21. Page 101 Try These 5 Round the numbers to the place indicated.

22. Page 102

23. Page 104

24. Rounding Decimal Numbers Complete Exercise 3.2 on pages 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 ____________