Rounding Numbers

1. Rounding Numbers Remember: If a number is 4 or lower, round down If a number is 5 or higher round up

2. Examples • Round 29 to the nearest ten • Underline the 2 because it is in the tens place • Put a box around the 9, the 9 is the number that you look at to figure out the rule • Since 9 is 5 or higher, you would round up • You will add one to the 2 which makes it a 3 and every number behind the underlined digit becomes a 0 • So 29 rounded to the nearest 10 is 30

3. Examples • Round 409 to the nearest 100 • You would underline the 4 because it is in the hundreds place and put a box around the 0 • The 0 is 4 or lower so you would round down • The 4 will stay the same and every number behind it will become a 0 • So 409 rounded to the nearest hundred will be 400

4. Examples • Round 273 to the nearest ten • You would underline the 7 because it is in the tens place and put a box around the 3 • The 2 in the hundreds place would stay the same because we are not rounding to that place value, the 3 tells us that we are rounding down so the 7 stays the same and every number behind it becomes a 0 • So 273 rounded to the nearest ten would be 270

5. Round to the nearest 10 • 37 • 73 • 85 • 427 • 1,735

6. Round to the nearest hundred • 166 • 551 • 309 • 249 • 4,032

7. Round to the nearest ten • 15 • 86 • 42 • 55 • 97

8. Round to the nearest 10 • 154 • 641 • 901 • 325 • 1,508

9. Round to the nearest hundred • 451 • 203 • 670 • 448 • 952

10. Round to the nearest hundred • 926 • 1,799 • 1,008 • 1,885 • 1,896

11. Order the numbers from least to greatest • 10,276 24,324 10,129 • 452,100 327,000 516,200

12. Order from least to greatest • 343 509 124 • 798 978 879 • 2,098 2,077 1,399

13. Find the missing numbers in the patterns • 4, 7, 10, ____,____,____ • 12, 15, 18,____,____,____ • 3, 10, 17,____,____,____