Learning about rounding numbers is a big part of KS2 Maths! In Years Three and Four, kids discover how to round whole numbers to the nearest ten or hundred.
Rounding means making numbers simpler, closer to the nearest ten or hundred. It's like deciding which group of ten or hundred a number belongs to. But, if a number ends in 5 or 50, we always round it up!
Rounded numbers aren't exact, but they're really helpful for big numbers. Try a quiz to see how well you know rounding numbers. Perfect for 7-9 year olds!
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You can find more about this topic by visiting BBC Bitesize - How to round numbers
33 is closer to 30 than 40
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87 is only 3 less than 90
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As 45 is half way between 40 and 50 the rule is to always round 5 up
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25 is rounded up as it ends in a 5
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Remember that 5s are rounded up not down
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379 is closer to 400 than to 300
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As 41 is less than 50, 641 is rounded down to 600
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Just as 5 is rounded up to 10, 50 is rounded up to 100 so 250 would not be rounded down
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As the number ends in 50 we always round up to the nearest 100
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34 ÷ 6 = 5 with 4 left over. As the remaining 4 need to go in a box 6 boxes are needed
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