Download presentation

Presentation is loading. Please wait.

1
**How to Round Whole Numbers**

2
A Number Line When rounding number, some times it helps to remember and to use a number line. | | | | | | | | | | | | | | | | | | | | | | | |

3
**Rounding Numbers BASIC RULES**

If the number to the RIGHT of the Rounding Number is 5 or more (5, 6, 7 8 or 9) then the LEFT (Rounding Number) number goes UP by ONE place. 2. If the number to the RIGHT of the Rounding Number is 4 or less (4, 3, 2, 1 or 0) then the LEFT (Rounding Number) number remains the SAME. 3. Every number AFTER the Rounding Number becomes 0. 4. Everything BEFORE the Rounding Number remains the same. 5. If the Rounding Number is a 9 and it goes up by one, then a 0 is placed in the Rounding Number Place and 1 is moved to the next place to the LEFT. (same as carrying in adding)

4
**How to Round Whole Numbers to the Tens Place**

Example: Round 78 to the nearest tens place | | | | | | | | | | 80 70 78 Use a number line to help you visualize 1. Underline the place you want to round to. Here we want the tens place

5
**How to Round Whole Numbers to the Tens Place**

Example: Round 78 to the nearest tens place 2. Look to the right of the place you want to round to, Now look to the right of the 78 tens place Look here If the digit is 5, 6, 7, 8 or 9 – the digit in the tens place goes UP by 1 If the digit is 0, 1, 2, 3 or 4 – the digit in the tens place STAYS THE SAME The 7 in the tens place goes up by 1 to 8

6
**How to Round Whole Numbers to the Tens Place**

Example: Round 78 to the nearest tens place 3. Next, the digits to the right of the rounding place become zero. Now the 8 becomes zero becomes 4. Anything to the left of the rounding place remains the same. So 78 rounded to the nearest tens place is 80

7
**How to Round Whole Numbers to the Tens Place**

Example: Round 123 to the nearest tens place | | | | | | | | | | 130 120 123 To Round: Here is the tens place Look to the right , so the 2 in the tens place stays the same. On the left On the left hand side, all stays the same 123 rounds to 120

8
**How to Round Whole Numbers to the Tens Place**

Example: Round to the nearest tens place | | | | | | | | | | 1100 1090 1099 To Round: Here is the tens place with 9 to its right The 9 in the tens place goes up by one. **But, 9 goes to 10 and we only have one place So we need to move over one more place to the left adding 1 to the hundreds place and 0 to the tens place. All on right changes to zero. rounds to 1 100

9
**How to Round Whole Numbers to the Tens Place**

Example: Round the following to the nearest tens place To Round: 2 65 234 2 343 45 678 65 723 __2 65 234 2 343 45 678 65 723 70 230 2 340 45 680 65 720 Look to the value of the place to the right of the tens place

10
**Practice Round the following numbers to the nearest tens place. 45 67**

123 456 890 1232 a) 50 b) 70 c) 120 d) 460 e) 890 f) 1 230

11
**How to Round Whole Numbers to the Hundreds Place**

Example: Round 145 to the nearest hundreds place | | | | | | | | | | 200 100 145 Use a number line to help you visualize 1. Underline the place you want to round to. Here we want the hundreds place

12
**How to Round Whole Numbers to the Hundreds Place**

Example: Round 145 to the nearest hundreds place 2. Look to the right of the place you want to round to, Now look to the right of the 145 tens place If the digit is 5, 6, 7, 8 or 9 – the digit in the hundreds place goes UP by 1 If the digit is 0, 1, 2, 3 or 4 – the digit in the hundreds place STAYS THE SAME The 1 in the hundreds place stays the same

13
**How to Round Whole Numbers to the Hundreds Place**

Example: Round 145 to the nearest hundreds place 3. Next, the digits to the right of the rounding place become zero. Now the 4 and 5 becomes zero becomes 4. Anything to the left of the rounding place remains the same. So 145 rounded to the nearest hundreds place is 100

14
**How to Round Whole Numbers to the Hundreds Place**

Example: Round the following to the nearest hundreds place To Round: 2 65 234 2 343 45 678 65 723 _ _ 2 _65 234 2 343 45 678 65 723 100 200 2 300 45 700 65 700 Look to the value of the place to the right of the hundreds place

15
**Practice Round the following numbers to the nearest hundreds place. 49**

136 293 456 1 890 12 345 a) 0 b) 100 c) 300 d) 500 e) 1 900 f)

16
**How to Round Whole Numbers to the Thousands Place**

Example: Round to the nearest thousands place | | | | | | | | | | | 10 000 9000 9 871 Use a number line to help you visualize 1. Underline the place you want to round to. Here we want the thousands

17
**How to Round Whole Numbers to the Thousands Place**

Example: Round to the nearest thousands place 2. Look to the right of the place you want to round to, Now look to the right of the thousands place If the digit is 5, 6, 7, 8 or 9 – the digit in the thousands place goes UP by 1 If the digit is 0, 1, 2, 3 or 4 – the digit in the thousands place STAYS THE SAME The 9 in the thousands place goes up by 1

18
**How to Round Whole Numbers to the Thousands Place**

Example: Round to the nearest thousands place 3. Next, the digits to the right of the rounding place become zero. Now the 8,7 and 1 becomes zero becomes 4. Anything to the left of the rounding place remains the same. So rounded to the nearest thousand place is

19
**How to Round Whole Numbers to the Thousands Place**

Example: Round the following to the nearest thousands place To Round: 2 65 234 2 343 45 678 65 723 _ _ _ 2 _ _65 _234 2 343 45 678 65 723 2 000 46 000 66 000 Look to the value of the place to the right of the thousands place

20
**Practice Round the following numbers to the nearest thousands place.**

1 234 78 902 12 666 9 987 2 890 a) 1 000 b) c) d) e) 3 000 f)

21
**How to Round Whole Numbers to the Ten Thousands Place**

Example: Round to the nearest ten thousands place | | | | | | | | | | 20 000 19 000 19 012 Use a number line to help you visualize 1. Underline the place you want to round to. Here we want the ten thousands place

22
**How to Round Whole Numbers to the Ten Thousands Place**

Example: Round to the nearest ten thousands place 2. Look to the right of the place you want to round to, Now look to the right of the ten thousands place If the digit is 5, 6, 7, 8 or 9 – the digit in the ten thousands place goes UP by 1 If the digit is 0, 1, 2, 3 or 4 – the digit in the ten thousands place STAYS THE SAME The 1 in the ten thousands place goes up by one

23
**How to Round Whole Numbers to the Ten Thousands Place**

Example: Round to the nearest ten thousands place 3. Next, the digits to the right of the rounding place become zero. All the numbers on the becomes right becomes zero 4. Anything to the left of the rounding place remains the same. So rounded to the nearest ten thousands place is

24
**How to Round Whole Numbers to the Ten Thousands Place**

Example: Round the following to the nearest ten thousands place To Round: 2 65 234 2 343 45 678 65 723 _ _ 2 _65 234 2 343 45 678 65 723 70 230 2 340 45 680 65 720 Look to the value of the place to the right of the tens place

25
**Round the following numbers to the nearest ten thousands place.**

Practice Round the following numbers to the nearest ten thousands place. 45 653 a) b) c) d) e)

26
**How to Round Whole Numbers to the Hundred Thousands Place**

Example: Round 145 to the nearest hundreds place | | | | | | | | | | 200 100 145 Use a number line to help you visualize 1. Underline the place you want to round to. Here we want the hundreds place

27
**How to Round Whole Numbers to the Hundred Thousands Place**

Example: Round 145 to the nearest hundreds place 2. Look to the right of the place you want to round to, Now look to the right of the 145 tens place If the digit is 5, 6, 7, 8 or 9 – the digit in the hundreds place goes UP by 1 If the digit is 0, 1, 2, 3 or 4 – the digit in the hundreds place STAYS THE SAME The 1 in the hundreds place stays the same

28
**How to Round Whole Numbers to the Hundred Thousands Place**

Example: Round 145 to the nearest hundreds place 3. Next, the digits to the right of the rounding place become zero. Now the 4 and 5 becomes zero becomes 4. Anything to the left of the rounding place remains the same. So 145 rounded to the nearest hundreds place is 100

29
**How to Round Whole Numbers to the Hundred Thousands Place**

Example: Round the following to the nearest hundred thousands place To Round: 2 65 234 2 343 45 678 65 723 _ _ 2 _65 234 2 343 45 678 65 723 70 230 2 340 45 680 65 720 Look to the value of the place to the right of the tens place

30
**Round the following numbers to the nearest hundred thousands place.**

Practice Round the following numbers to the nearest hundred thousands place. a) b) c) d) e)

31
**How to Round Whole Numbers to the Millions Place**

Example: Round 145 to the nearest hundreds place | | | | | | | | | | 200 100 145 Use a number line to help you visualize 1. Underline the place you want to round to. Here we want the hundreds place

32
**How to Round Whole Numbers to the Millions Place**

Example: Round 145 to the nearest hundreds place 2. Look to the right of the place you want to round to, Now look to the right of the 145 tens place If the digit is 5, 6, 7, 8 or 9 – the digit in the hundreds place goes UP by 1 If the digit is 0, 1, 2, 3 or 4 – the digit in the hundreds place STAYS THE SAME The 1 in the hundreds place stays the same

33
**How to Round Whole Numbers to the Millions Place**

Example: Round 145 to the nearest hundreds place 3. Next, the digits to the right of the rounding place become zero. Now the 4 and 5 becomes zero becomes 4. Anything to the left of the rounding place remains the same. So 145 rounded to the nearest hundreds place is 100

34
**How to Round Whole Numbers to the Millions Place**

Example: Round the following to the nearest millions place To Round: 2 65 234 2 343 45 678 65 723 _ _ 2 _65 234 2 343 45 678 65 723 70 230 2 340 45 680 65 720 Look to the value of the place to the right of the tens place

35
**Round the following numbers to the nearest millions place.**

Practice Round the following numbers to the nearest millions place. a) b) c) d) e)

36
**How to Round Whole Numbers**

Example: Round 78 to the nearest tens place | | | | | | | | | | | | 80 70 78 Use a number line to help you visualize 1. Underline the place you want to round to. Here we want the tens place

37
**Some Examples: 1. Round to the nearest 10 12 ____________**

12 ____________ Or use a number line is 12 closer to 10 or to 20?

38
Examples Because ... rounded to hundredths is 3.14 ... the next digit (1) is less than 5 rounded to tenths is 1.3 ... the next digit (6) is 5 or more rounded to 3 decimal places is 1.264 ... the next digit (5) is 5 or more 134.9 rounded to tens is 130 ... the next digit (4) is less than 5 12,690 rounded to thousands is 13,000 1.239 rounded to units is 1 ... the next digit (2) is less than 5

Similar presentations

© 2022 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google