Study Guide 1/2 G05 ~ Mathematics
Rounding Round to the nearest 5
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Numbers ending with 3, 4, 5, 6 and 7 are rounded to 5. Numbers ending with 1 and 2 are rounded to the previous ten (end with a 0). Numbers ending with 8 and 9 are rounded to the next ten (end with a 0). Round to the nearest 10
Numbers smaller than 5 are rounded to the previous ten (end with a 0).
Numbers ending with 5, 6, 7, 8 and 9 are rounded to the next ten (end with a 0). Round 6 858 to the nearest 10:
Th HTU 6 858
Look at the tens column
The ones column must help you decide (8 is greater than 5, therefore the number is rounded to the next ten and ends with a 0 the answer is 6 860.)
Round to the nearest 100 Numbers smaller than 5 are rounded to the previous hundred (end with a 0). Numbers ending with 5, 6, 7, 8 and 9 are rounded to the next 100 (end with a 0). Round 6 858 to the nearest 100:
Th HTU 6 858
Look at the hundreds column
The tens column must help you decide (5 and greater are rounded to the next 100 and end with a 0 the answer is 6 900.)
Apply the same method when you round to 1 000. (The hundreds column must help you decide.)
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