YEAR 5 REVISION Number and Place Value 3
YEAR 5 REVISION Number and Place Value #3 Rounding to the nearest 10, 100 and 1000.
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 10 we are explaining which 10 that number is closest to.
We can follow the same process for rounding to any degree of accuracy. Round 8 763 562 to the ten. 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 ten or down to the same ten). 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 the number of tens will stay the same: 763 560 M O Hth Th H T 763562
We can follow the same process for rounding to any degree of accuracy. Round 620 656 to the ten. 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 ten or down to the same ten). 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 ten. 620 660 M Hth Th H T 620656 O
We can follow the same process for rounding to any degree of accuracy. Round 5 182 345 to the nearest ten 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 ten or down to the same ten). 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 5 so I’m going to round up to the next ten. 180 350 M Hth Th H T 180345 O
We can follow the same process for rounding to any degree of accuracy. Round 147 382 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 hundred or down to the same hundred). 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 8 so I’m going to round up to the next hundred. 147 400 M O Hth Th H T 147382
We can follow the same process for rounding to any degree of accuracy. Round 684 214 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 hundred or down to the same hundred). M O Hth Th H T 684 214 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 1 so I’m going to round down. The hundreds will stay the same. 684 200
We can follow the same process for rounding to any degree of accuracy. Round 700 524 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 hundred or down to the same hundred). M O Hth Th H T 700 524 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 hundreds will stay the same. 700 500
We can follow the same process for rounding to any degree of accuracy. Round 841 256 to the nearest 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 thousand or down to the same thousand). M O Hth Th H T 841 256 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 thousands will stay the same. 841 000
We can follow the same process for rounding to any degree of accuracy. Round 457 684 to the nearest 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 thousand or down to the same thousand). M O 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 am going to round up to the next thousand. 458 000 Hth Th H T 457 684
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