Rounding to the Nearest 10, 100, and 1,000 for 4th Grade
Rounding helps us use simpler numbers when we do not need exact values. In Grade 4, students round whole numbers to the nearest 10, 100, or 1,000. The rule is the same for each place: look at the digit to the right of the place you are rounding to. If that digit is 5 or greater, round up (add 1 to the place and make everything to the right zero). If it is 4 or less, round down (keep the place and make everything to the right zero).
Rounding is useful for estimating sums and differences, reading approximate populations, and checking whether an answer is reasonable. It also reinforces place value because students must identify which digit is in the tens, hundreds, or thousands place.
DETAILED EXPLANATION
To round to the nearest 10: Look at the ones digit. If it is 5, 6, 7, 8, or 9, round up the tens place and replace the ones with 0. If it is 0, 1, 2, 3, or 4, keep the tens digit and replace the ones with 0. Example: 347 rounded to the nearest 10 is 350 (ones digit 7, so round up). 342 rounded to the nearest 10 is 340 (ones digit 2, so round down).
To round to the nearest 100: Look at the tens digit. 5 or more → round up the hundreds; 4 or less → round down. Example: 2,678 to the nearest 100 is 2,700. To round to the nearest 1,000: Look at the hundreds digit. Same rule. Example: 8,452 to the nearest 1,000 is 8,000.
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WORKED EXAMPLES WITH STEP BY STEP SOLUTIONS
Example 1
Round 4,762 to the nearest 100.
Solutions:
Step 1: The digit in the hundreds place is 7. The digit to the right (tens) is 6.
Step 2: 6 is 5 or greater, so we round up. Add 1 to the hundreds: 7 + 1 = 8. Replace tens and ones with 0.
Step 3: 4,762 rounds to 4,800.
Answer: 4,800
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