YEAR 6 REVISION Number and Place Value 3
YEAR 6 REVISION Number and Place Value #3 Rounding to any degree of accuracy.
We round numbers to give a more approximate value. We are saying which number it is closest to. For example, when rounding to the nearest million we are explaining which million that number is closest to.
We can follow the same process for rounding to any degree of accuracy. Round 8 763 562 to the nearest hundred thousand. 1. Underline the column you are rounding to. 2. Point to the column that comes before. (this will tell us whether we are rounding up to the next hundredth thousand or down to the same hundred thousand). M Hth Th H T 8 763562 3. The column you are pointing to shows you whether you are rounding up or down. 5 or more round up. 4 or less round down. I’m pointing at a 6 so I’m going to round up to the next hundred thousand: 8 800 000 O
We can follow the same process for rounding to any degree of accuracy. Round 7 620 653 to the nearest hundred thousand. 1. Underline the column you are rounding to. 2. Point to the column that comes before. (this will tell us whether we are rounding up to the next hundredth thousand or down to the same hundred thousand). M Hth Th H T O 7 620653 3. The column you are pointing to shows you whether you are rounding up or down. 5 or more round up. 4 or less round down. I’m pointing at a 2 so I’m going to round down the hundred thousand column will remain the same. 6 600 000
We can follow the same process for rounding to any degree of accuracy. Round 5 182 345 to the nearest ten thousand. 1. Underline the column you are rounding to. 2. Point to the column that comes before. (this will tell us whether we are rounding up to the next hundredth thousand or down to the same hundred thousand). M Hth Th H T O 5 180345 3. The column you are pointing to shows you whether you are rounding up or down. 5 or more round up. 4 or less round down. I’m pointing at a 0 so I’m going to round down the ten thousand column will remain the same. 5 180 345
We can follow the same process for rounding to any degree of accuracy. Round 147 382 to the nearest ten thousand. 1. Underline the column you are rounding to. 2. Point to the column that comes before. (this will tell us whether we are rounding up to the next hundredth thousand or down to the same hundred thousand). M Hth Th H T 3. The column you are pointing to shows you whether you are rounding up or down. 5 or more round up. 4 or less round down. I’m pointing at a 7 so I’m going to round up to the next ten thousand. 150 000 O 147382
We can follow the same process for rounding to any degree of accuracy. Round 4 239 810 to the nearest hundred. 1. Underline the column you are rounding to. 2. Point to the column that comes before. (this will tell us whether we are rounding up to the next hundredth thousand or down to the same hundred thousand). M Hth Th H T 4 239810 3. The column you are pointing to shows you whether you are rounding up or down. 5 or more round up. 4 or less round down. I am pointing at a 1. I am going to round down so the hundreds column stays the same. 4 239 800 O
We can follow the same process for rounding to any degree of accuracy. Round 5 349 625 to the nearest million. 1. Underline the column you are rounding to. 2. Point to the column that comes before. (this will tell us whether we are rounding up to the next hundredth thousand or down to the same hundred thousand). M Hth Th H T 5 349625 3. The column you are pointing to shows you whether you are rounding up or down. 5 or more round up. 4 or less round down. I am pointing at a 3. I am going to round down so the millions column stays the same. 5 000 O
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